Microsoft Patches Released
Below is a list of patches released by Microsoft May, 2026.
articleID supportURL UpdateName Description Architecture Classification Severity SupportedProducts
KB5093446 https://support.microsoft.com/help/5093446 https://www.catalog.update.microsoft.com/Search.aspx?q=5093446 2026-05 .NET 10.0.8 Security Update for x86 Client (KB5093446) 2026-05 .NET 10.0.8 Security Update for x86 Client (KB5093446) X86 Security Updates Important .NET 10.0
KB5093446 https://support.microsoft.com/help/5093446 https://www.catalog.update.microsoft.com/Search.aspx?q=5093446 2026-05 .NET 10.0.8 Security Update for ARM64 Client (KB5093446) 2026-05 .NET 10.0.8 Security Update for ARM64 Client (KB5093446) ARM64 Security Updates Important .NET 10.0
KB5093446 https://support.microsoft.com/help/5093446 https://www.catalog.update.microsoft.com/Search.aspx?q=5093446 2026-05 .NET 10.0.8 Security Update for x64 Client (KB5093446) 2026-05 .NET 10.0.8 Security Update for x64 Client (KB5093446) AMD64 Security Updates Important .NET 10.0
KB5093446 https://support.microsoft.com/help/5093446 https://www.catalog.update.microsoft.com/Search.aspx?q=5093446 2026-05 .NET 10.0.8 Security Update for x64 Server (KB5093446) 2026-05 .NET 10.0.8 Security Update for x64 Server (KB5093446) AMD64 Security Updates Important .NET 10.0
KB5093447 https://support.microsoft.com/help/5093447 https://www.catalog.update.microsoft.com/Search.aspx?q=5093447 2026-05 .NET 8.0.27 Security Update for x64 Server (KB5093447) 2026-05 .NET 8.0.27 Security Update for x64 Server (KB5093447) AMD64 Security Updates Important .NET 8.0
KB5093447 https://support.microsoft.com/help/5093447 https://www.catalog.update.microsoft.com/Search.aspx?q=5093447 2026-05 .NET 8.0.27 Security Update for x64 Client (KB5093447) 2026-05 .NET 8.0.27 Security Update for x64 Client (KB5093447) AMD64 Security Updates Important .NET 8.0
KB5093447 https://support.microsoft.com/help/5093447 https://www.catalog.update.microsoft.com/Search.aspx?q=5093447 2026-05 .NET 8.0.27 Security Update for x86 Client (KB5093447) 2026-05 .NET 8.0.27 Security Update for x86 Client (KB5093447) X86 Security Updates Important .NET 8.0
KB5093447 https://support.microsoft.com/help/5093447 https://www.catalog.update.microsoft.com/Search.aspx?q=5093447 2026-05 .NET 8.0.27 Security Update for ARM64 Client (KB5093447) 2026-05 .NET 8.0.27 Security Update for ARM64 Client (KB5093447) ARM64 Security Updates Important .NET 8.0
KB5093448 https://support.microsoft.com/help/5093448 https://www.catalog.update.microsoft.com/Search.aspx?q=5093448 2026-05 .NET 9.0.16 Security Update for x64 Client (KB5093448) 2026-05 .NET 9.0.16 Security Update for x64 Client (KB5093448) AMD64 Security Updates Important .NET 9.0
KB5093448 https://support.microsoft.com/help/5093448 https://www.catalog.update.microsoft.com/Search.aspx?q=5093448 2026-05 .NET 9.0.16 Security Update for x64 Server (KB5093448) 2026-05 .NET 9.0.16 Security Update for x64 Server (KB5093448) AMD64 Security Updates Important .NET 9.0
KB5093448 https://support.microsoft.com/help/5093448 https://www.catalog.update.microsoft.com/Search.aspx?q=5093448 2026-05 .NET 9.0.16 Security Update for ARM64 Client (KB5093448) 2026-05 .NET 9.0.16 Security Update for ARM64 Client (KB5093448) ARM64 Security Updates Important .NET 9.0
KB5093448 https://support.microsoft.com/help/5093448 https://www.catalog.update.microsoft.com/Search.aspx?q=5093448 2026-05 .NET 9.0.16 Security Update for x86 Client (KB5093448) 2026-05 .NET 9.0.16 Security Update for x86 Client (KB5093448) X86 Security Updates Important .NET 9.0
KB5087065 https://support.microsoft.com/help/5087065 https://www.catalog.update.microsoft.com/Search.aspx?q=5087065 2026-05 Cumulative Update for .NET Framework 4.8 for Windows 10 Version 1607 for x64 (KB5087065) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. AMD64 Security Updates Important Windows 10
KB5087065 https://support.microsoft.com/help/5087065 https://www.catalog.update.microsoft.com/Search.aspx?q=5087065 2026-05 Cumulative Update for .NET Framework 4.8 for Windows 10 Version 1607 (KB5087065) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. X86 Security Updates Important Windows 10
KB5087065 https://support.microsoft.com/help/5087065 https://www.catalog.update.microsoft.com/Search.aspx?q=5087065 2026-05 Cumulative Update for .NET Framework 4.8 for Windows Server 2016 for x64 (KB5087065) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. AMD64 Security Updates Important Windows Server 2016
KB5087067 https://support.microsoft.com/help/5087067 https://www.catalog.update.microsoft.com/Search.aspx?q=5087067 2026-05 Security and Quality Rollup for .NET Framework 4.8 for Windows Server 2012 for x64 (KB5087067) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. AMD64 Security Updates Important Windows Server 2012
KB5087069 https://support.microsoft.com/help/5087069 https://www.catalog.update.microsoft.com/Search.aspx?q=5087069 2026-05 Security and Quality Rollup for .NET Framework 4.8 for Windows Server 2012 R2 for x64 (KB5087069) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. AMD64 Security Updates Important Windows Server 2012 R2
KB5087066 https://support.microsoft.com/help/5087066 https://www.catalog.update.microsoft.com/Search.aspx?q=5087066 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows Server 2019 for x64 (KB5087066) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. AMD64 Security Updates Important Windows Server 2019
KB5087066 https://support.microsoft.com/help/5087066 https://www.catalog.update.microsoft.com/Search.aspx?q=5087066 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 Version 1809 (KB5087066) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. X86 Security Updates Important Windows 10
KB5087066 https://support.microsoft.com/help/5087066 https://www.catalog.update.microsoft.com/Search.aspx?q=5087066 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 Version 1809 for x64 (KB5087066) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. AMD64 Security Updates Important Windows 10
KB5087068 https://support.microsoft.com/help/5087068 https://www.catalog.update.microsoft.com/Search.aspx?q=5087068 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8 for Microsoft server operating system version 21H2 for x64 (KB5087068) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. AMD64 Security Updates Important Microsoft Server operating system-21H2
KB5087064 https://support.microsoft.com/help/5087064 https://www.catalog.update.microsoft.com/Search.aspx?q=5087064 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 Version 21H2 for ARM64 (KB5087064) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. ARM64 Security Updates Important Windows 10 LTSB
KB5087064 https://support.microsoft.com/help/5087064 https://www.catalog.update.microsoft.com/Search.aspx?q=5087064 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 Version 22H2 (KB5087064) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. X86 Security Updates Important Windows 10, version 1903 and later
KB5087064 https://support.microsoft.com/help/5087064 https://www.catalog.update.microsoft.com/Search.aspx?q=5087064 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 Version 21H2 (KB5087064) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. X86 Security Updates Important Windows 10 LTSB
KB5087064 https://support.microsoft.com/help/5087064 https://www.catalog.update.microsoft.com/Search.aspx?q=5087064 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 Version 22H2 for ARM64 (KB5087064) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. ARM64 Security Updates Important Windows 10, version 1903 and later
KB5087064 https://support.microsoft.com/help/5087064 https://www.catalog.update.microsoft.com/Search.aspx?q=5087064 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 Version 22H2 for x64 (KB5087064) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. AMD64 Security Updates Important Windows 10, version 1903 and later
KB5087064 https://support.microsoft.com/help/5087064 https://www.catalog.update.microsoft.com/Search.aspx?q=5087064 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 Version 21H2 for x64 (KB5087064) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. AMD64 Security Updates Important Windows 10 LTSB
KB5087061 https://support.microsoft.com/help/5087061 https://www.catalog.update.microsoft.com/Search.aspx?q=5087061 2026-05 Cumulative Update for .NET Framework 3.5 and 4.7.2 for Windows 10 Version 1809 for ARM64 (KB5087061) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. ARM64 Security Updates Important Windows 10
KB5087061 https://support.microsoft.com/help/5087061 https://www.catalog.update.microsoft.com/Search.aspx?q=5087061 2026-05 Cumulative Update for .NET Framework 3.5 and 4.7.2 for Windows Server 2019 for x64 (KB5087061) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. AMD64 Security Updates Important Windows Server 2019
KB5087061 https://support.microsoft.com/help/5087061 https://www.catalog.update.microsoft.com/Search.aspx?q=5087061 2026-05 Cumulative Update for .NET Framework 3.5 and 4.7.2 for Windows 10 Version 1809 (KB5087061) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. X86 Security Updates Important Windows 10
KB5087061 https://support.microsoft.com/help/5087061 https://www.catalog.update.microsoft.com/Search.aspx?q=5087061 2026-05 Cumulative Update for .NET Framework 3.5 and 4.7.2 for Windows 10 Version 1809 for x64 (KB5087061) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. AMD64 Security Updates Important Windows 10
KB5087062 https://support.microsoft.com/help/5087062 https://www.catalog.update.microsoft.com/Search.aspx?q=5087062 2026-05 Security and Quality Rollup for .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows Server 2012 for x64 (KB5087062) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. AMD64 Security Updates Important Windows Server 2012
KB5087063 https://support.microsoft.com/help/5087063 https://www.catalog.update.microsoft.com/Search.aspx?q=5087063 2026-05 Security and Quality Rollup for .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows Server 2012 R2 for x64 (KB5087063) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. AMD64 Security Updates Important Windows Server 2012 R2
KB5087059 https://support.microsoft.com/help/5087059 https://www.catalog.update.microsoft.com/Search.aspx?q=5087059 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Microsoft server operating system version 21H2 for x64 (KB5087059) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. AMD64 Security Updates Important Microsoft Server operating system-21H2
KB5087053 https://support.microsoft.com/help/5087053 https://www.catalog.update.microsoft.com/Search.aspx?q=5087053 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 10 Version 21H2 (KB5087053) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. X86 Security Updates Important Windows 10 LTSB
KB5087053 https://support.microsoft.com/help/5087053 https://www.catalog.update.microsoft.com/Search.aspx?q=5087053 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 10 Version 22H2 for x64 (KB5087053) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. AMD64 Security Updates Important Windows 10, version 1903 and later
KB5087053 https://support.microsoft.com/help/5087053 https://www.catalog.update.microsoft.com/Search.aspx?q=5087053 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 10 Version 22H2 (KB5087053) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. X86 Security Updates Important Windows 10, version 1903 and later
KB5087053 https://support.microsoft.com/help/5087053 https://www.catalog.update.microsoft.com/Search.aspx?q=5087053 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 10 Version 21H2 for x64 (KB5087053) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. AMD64 Security Updates Important Windows 10 LTSB
KB5087058 https://support.microsoft.com/help/5087058 https://www.catalog.update.microsoft.com/Search.aspx?q=5087058 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 23H2 for x64 (KB5087058) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. n/a Security Updates Critical Windows 11
KB5087058 https://support.microsoft.com/help/5087058 https://www.catalog.update.microsoft.com/Search.aspx?q=5087058 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 23H2 for arm64 (KB5087058) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. n/a Security Updates Critical Windows 11
KB5087051 https://support.microsoft.com/help/5087051 https://www.catalog.update.microsoft.com/Search.aspx?q=5087051 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 25H2 for x64 (KB5087051) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. n/a Security Updates Critical Windows 11
KB5087051 https://support.microsoft.com/help/5087051 https://www.catalog.update.microsoft.com/Search.aspx?q=5087051 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Microsoft server operating system version 24H2 for arm64 (KB5087051) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. n/a Security Updates Critical Microsoft Server Operating System-24H2
KB5087051 https://support.microsoft.com/help/5087051 https://www.catalog.update.microsoft.com/Search.aspx?q=5087051 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Microsoft server operating system version 24H2 for x64 (KB5087051) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. n/a Security Updates Critical Microsoft Server Operating System-24H2
KB5087051 https://support.microsoft.com/help/5087051 https://www.catalog.update.microsoft.com/Search.aspx?q=5087051 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 25H2 for arm64 (KB5087051) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. n/a Security Updates Critical Windows 11
KB5087055 https://support.microsoft.com/help/5087055 https://www.catalog.update.microsoft.com/Search.aspx?q=5087055 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 26H1 for x64 (KB5087055) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. n/a Security Updates Critical Windows Insider Pre-Release
KB5087055 https://support.microsoft.com/help/5087055 https://www.catalog.update.microsoft.com/Search.aspx?q=5087055 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 26H1 for arm64 (KB5087055) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. n/a Security Updates Critical Windows 11
KB5087054 https://support.microsoft.com/help/5087054 https://www.catalog.update.microsoft.com/Search.aspx?q=5087054 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 24H2 for x64 (KB5087054) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. n/a Security Updates Critical Windows 11
KB5087054 https://support.microsoft.com/help/5087054 https://www.catalog.update.microsoft.com/Search.aspx?q=5087054 2026-05 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 24H2 for arm64 (KB5087054) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. n/a Security Updates Critical Windows 11
KB5087048 https://support.microsoft.com/help/5087048 https://www.catalog.update.microsoft.com/Search.aspx?q=5087048 2026-05 Security and Quality Rollup for .NET Framework 3.5 for Windows Server 2012 for x64 (KB5087048) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. AMD64 Security Updates Important Windows Server 2012
KB5087049 https://support.microsoft.com/help/5087049 https://www.catalog.update.microsoft.com/Search.aspx?q=5087049 2026-05 Security and Quality Rollup for .NET Framework 3.5 for Windows Server 2012 R2 for x64 (KB5087049) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. AMD64 Security Updates Important Windows Server 2012 R2
KB5087538 https://support.microsoft.com/help/5087538 https://www.catalog.update.microsoft.com/Search.aspx?q=5087538 2026-05 Cumulative Update for Windows 10 Version 1809 for x64-based Systems (KB5087538) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. AMD64 Security Updates Critical Windows 10 LTSB
KB5087538 https://support.microsoft.com/help/5087538 https://www.catalog.update.microsoft.com/Search.aspx?q=5087538 2026-05 Cumulative Update for Windows 10 Version 1809 for x86-based Systems (KB5087538) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. X86 Security Updates Critical Windows 10 LTSB
KB5087538 https://support.microsoft.com/help/5087538 https://www.catalog.update.microsoft.com/Search.aspx?q=5087538 2026-05 Cumulative Update for Windows Server 2019 for x64-based Systems (KB5087538) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. AMD64 Security Updates Critical Windows Server 2019
KB5087545 https://support.microsoft.com/help/5087545 https://www.catalog.update.microsoft.com/Search.aspx?q=5087545 2026-05 Cumulative Update for Microsoft server operating system version 21H2 for x64-based Systems (KB5087545) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. AMD64 Security Updates Critical Microsoft Server operating system-21H2
KB5087544 https://support.microsoft.com/help/5087544 https://www.catalog.update.microsoft.com/Search.aspx?q=5087544 2026-05 Dynamic Cumulative Update for Windows 10 Version 21H2 for ARM64-based Systems (KB5087544) ComponentUpdate: A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. n/a Security Updates Critical Windows 10 and later GDR-DU
KB5087544 https://support.microsoft.com/help/5087544 https://www.catalog.update.microsoft.com/Search.aspx?q=5087544 2026-05 Dynamic Cumulative Update for Windows 10 Version 21H2 for x64-based Systems (KB5087544) ComponentUpdate: A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. n/a Security Updates Critical Windows 10 and later GDR-DU
KB5087544 https://support.microsoft.com/help/5087544 https://www.catalog.update.microsoft.com/Search.aspx?q=5087544 2026-05 Cumulative Update for Windows 10 Version 21H2 for x64-based Systems (KB5087544) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. AMD64 Security Updates Critical Windows 10 LTSB
KB5087544 https://support.microsoft.com/help/5087544 https://www.catalog.update.microsoft.com/Search.aspx?q=5087544 2026-05 Cumulative Update for Windows 10 Version 22H2 for x86-based Systems (KB5087544) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. X86 Security Updates Critical Windows 10, version 1903 and later
KB5087544 https://support.microsoft.com/help/5087544 https://www.catalog.update.microsoft.com/Search.aspx?q=5087544 2026-05 Cumulative Update for Windows 10 Version 22H2 for x64-based Systems (KB5087544) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. AMD64 Security Updates Critical Windows 10, version 1903 and later
KB5087544 https://support.microsoft.com/help/5087544 https://www.catalog.update.microsoft.com/Search.aspx?q=5087544 2026-05 Cumulative Update for Windows 10 Version 21H2 for x86-based Systems (KB5087544) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. X86 Security Updates Critical Windows 10 LTSB
KB5087544 https://support.microsoft.com/help/5087544 https://www.catalog.update.microsoft.com/Search.aspx?q=5087544 2026-05 Dynamic Cumulative Update for Windows 10 Version 21H2 for x86-based Systems (KB5087544) ComponentUpdate: A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. n/a Security Updates Critical Windows 10 and later GDR-DU
KB5087544 https://support.microsoft.com/help/5087544 https://www.catalog.update.microsoft.com/Search.aspx?q=5087544 2026-05 Cumulative Update for Windows 10 Version 22H2 for ARM64-based Systems (KB5087544) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. ARM64 Security Updates Critical Windows 10, version 1903 and later
KB5087544 https://support.microsoft.com/help/5087544 https://www.catalog.update.microsoft.com/Search.aspx?q=5087544 2026-05 Cumulative Update for Windows 10 Version 21H2 for ARM64-based Systems (KB5087544) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. ARM64 Security Updates Critical Windows 10 LTSB
KB5087539 https://support.microsoft.com/help/5087539 https://www.catalog.update.microsoft.com/Search.aspx?q=5087539 2026-05 Cumulative Update for Microsoft server operating system version 24H2 for x64-based Systems (KB5087539) (26100.32860) Install this update to resolve issues in Microsoft server operating system, version 24H2. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer. n/a Security Updates Critical Microsoft Server Operating System-24H2
KB5089549 https://support.microsoft.com/help/5089549 https://www.catalog.update.microsoft.com/Search.aspx?q=5089549 2026-05 Cumulative Update for Windows 11, version 25H2 for arm64-based Systems (KB5089549) (26200.8457) Install this update to resolve issues in Windows. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer. n/a Security Updates Critical Windows 11
KB5089549 https://support.microsoft.com/help/5089549 https://www.catalog.update.microsoft.com/Search.aspx?q=5089549 2026-05 Cumulative Update for Windows 11, version 24H2 for x64-based Systems (KB5089549) (26100.8457) Install this update to resolve issues in Windows. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer. n/a Security Updates Critical Windows 11
KB5089549 https://support.microsoft.com/help/5089549 https://www.catalog.update.microsoft.com/Search.aspx?q=5089549 2026-05 Cumulative Update for Windows 11, version 24H2 for arm64-based Systems (KB5089549) (26100.8457) Install this update to resolve issues in Windows. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer. n/a Security Updates Critical Windows 11
KB5089549 https://support.microsoft.com/help/5089549 https://www.catalog.update.microsoft.com/Search.aspx?q=5089549 2026-05 Cumulative Update for Windows 11, version 25H2 for x64-based Systems (KB5089549) (26200.8457) Install this update to resolve issues in Windows. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer. n/a Security Updates Critical Windows 11
KB5087420 https://support.microsoft.com/help/5087420 https://www.catalog.update.microsoft.com/Search.aspx?q=5087420 2026-05 Cumulative Update for Windows 11, version 23H2 for x64-based Systems (KB5087420) Install this update to resolve issues in Windows. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer. n/a Security Updates Critical Windows 11
KB5087420 https://support.microsoft.com/help/5087420 https://www.catalog.update.microsoft.com/Search.aspx?q=5087420 2026-05 Cumulative Update for Windows 11, version 23H2 for arm64-based Systems (KB5087420) Install this update to resolve issues in Windows. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer. n/a Security Updates Critical Windows 11
KB5087541 https://support.microsoft.com/help/5087541 https://www.catalog.update.microsoft.com/Search.aspx?q=5087541 2026-05 Cumulative Update for Microsoft server operating system version 23H2 for x64-based Systems (KB5087541) Install this update to resolve issues in Microsoft server operating system, version 23H2. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer. n/a Security Updates Critical Microsoft Server Operating System-23H2
KB5089548 https://support.microsoft.com/help/5089548 https://www.catalog.update.microsoft.com/Search.aspx?q=5089548 2026-05 Cumulative Update for Windows 11, version 26H1 for x64-based Systems (KB5089548) (28000.2113) Install this update to resolve issues in Windows. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer. n/a Security Updates Critical Windows Insider Pre-Release
KB5089548 https://support.microsoft.com/help/5089548 https://www.catalog.update.microsoft.com/Search.aspx?q=5089548 2026-05 Cumulative Update for Windows 11, version 26H1 for arm64-based Systems (KB5089548) (28000.2113) Install this update to resolve issues in Windows. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer. n/a Security Updates Critical Windows 11
KB5087537 https://support.microsoft.com/help/5087537 https://www.catalog.update.microsoft.com/Search.aspx?q=5087537 2026-05 Cumulative Update for Windows 10 Version 1607 for x64-based Systems (KB5087537) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. AMD64 Security Updates Critical Windows 10
KB5087537 https://support.microsoft.com/help/5087537 https://www.catalog.update.microsoft.com/Search.aspx?q=5087537 2026-05 Cumulative Update for Windows Server 2016 for x64-based Systems (KB5087537) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. AMD64 Security Updates Critical Windows Server 2016
KB5087537 https://support.microsoft.com/help/5087537 https://www.catalog.update.microsoft.com/Search.aspx?q=5087537 2026-05 Cumulative Update for Windows 10 Version 1607 for x86-based Systems (KB5087537) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. X86 Security Updates Critical Windows 10
KB5087470 https://support.microsoft.com/help/5087470 https://www.catalog.update.microsoft.com/Search.aspx?q=5087470 2026-05 Security Monthly Quality Rollup for Windows Server 2012 for x64-based Systems (KB5087470) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. AMD64 Security Updates Critical Windows Server 2012
KB5087471 https://support.microsoft.com/help/5087471 https://www.catalog.update.microsoft.com/Search.aspx?q=5087471 2026-05 Security Monthly Quality Rollup for Windows Server 2012 R2 for x64-based Systems (KB5087471) A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. AMD64 Security Updates Critical Windows Server 2012 R2
KB5002868 https://support.microsoft.com/help/5002868 https://www.catalog.update.microsoft.com/Search.aspx?q=5002868 Security Update for Microsoft SharePoint Enterprise Server 2016 (KB5002868) A security vulnerability exists in Microsoft SharePoint Enterprise Server 2016 n/a Security Updates Important Office 2016
KB5002870 https://support.microsoft.com/help/5002870 https://www.catalog.update.microsoft.com/Search.aspx?q=5002870 Security Update for Microsoft SharePoint Server 2019 Core (KB5002870) A security vulnerability exists in Microsoft SharePoint Server 2019 Core n/a Security Updates Important SharePoint Server 2019/Office Online Server
KB5002863 https://support.microsoft.com/help/5002863 https://www.catalog.update.microsoft.com/Search.aspx?q=5002863 Security Update for Microsoft SharePoint Server Subscription Edition (KB5002863) A security vulnerability exists in Microsoft SharePoint Server Subscription Edition n/a Security Updates Important SharePoint Server Subscription Edition
KB5002858 https://support.microsoft.com/help/5002858 https://www.catalog.update.microsoft.com/Search.aspx?q=5002858 Security Update for Microsoft Word 2016 (KB5002858) 64-Bit Edition A security vulnerability exists in Microsoft Word 2016 64-Bit Edition that could allow arbitrary code to run when a maliciously modified file is opened. This update resolves that vulnerability. n/a Security Updates Important Office 2016
KB5002858 https://support.microsoft.com/help/5002858 https://www.catalog.update.microsoft.com/Search.aspx?q=5002858 Security Update for Microsoft Word 2016 (KB5002858) 32-Bit Edition A security vulnerability exists in Microsoft Word 2016 32-Bit Edition that could allow arbitrary code to run when a maliciously modified file is opened. This update resolves that vulnerability. n/a Security Updates Important Office 2016
KB5002871 https://support.microsoft.com/help/5002871 https://www.catalog.update.microsoft.com/Search.aspx?q=5002871 Security Update for Microsoft Office Online Server (KB5002871) A security vulnerability exists in Microsoft Office Online Server n/a Security Updates Important SharePoint Server 2019/Office Online Server
KB5002865 https://support.microsoft.com/help/5002865 https://www.catalog.update.microsoft.com/Search.aspx?q=5002865 Security Update for Microsoft Excel 2016 (KB5002865) 64-Bit Edition A security vulnerability exists in Microsoft Excel 2016 64-Bit Edition that could allow arbitrary code to run when a maliciously modified file is opened. This update resolves that vulnerability. n/a Security Updates Important Office 2016
KB5002865 https://support.microsoft.com/help/5002865 https://www.catalog.update.microsoft.com/Search.aspx?q=5002865 Security Update for Microsoft Excel 2016 (KB5002865) 32-Bit Edition A security vulnerability exists in Microsoft Excel 2016 32-Bit Edition that could allow arbitrary code to run when a maliciously modified file is opened. This update resolves that vulnerability. n/a Security Updates Important Office 2016
KB5002866 https://support.microsoft.com/help/5002866 https://www.catalog.update.microsoft.com/Search.aspx?q=5002866 Security Update for Microsoft Office 2016 (KB5002866) 32-Bit Edition A security vulnerability exists in Microsoft Office 2016 32-Bit Edition that could allow arbitrary code to run when a maliciously modified file is opened. This update resolves that vulnerability. n/a Security Updates Important Office 2016
KB5002866 https://support.microsoft.com/help/5002866 https://www.catalog.update.microsoft.com/Search.aspx?q=5002866 Security Update for Microsoft Office 2016 (KB5002866) 64-Bit Edition A security vulnerability exists in Microsoft Office 2016 64-Bit Edition that could allow arbitrary code to run when a maliciously modified file is opened. This update resolves that vulnerability. n/a Security Updates Important Office 2016
KB5002869 https://support.microsoft.com/help/5002869 https://www.catalog.update.microsoft.com/Search.aspx?q=5002869 Security Update for Microsoft SharePoint Enterprise Server 2016 (KB5002869) A security vulnerability exists in Microsoft SharePoint Enterprise Server 2016 n/a Security Updates Important Office 2016
KB5002872 https://support.microsoft.com/help/5002872 https://www.catalog.update.microsoft.com/Search.aspx?q=5002872 Security Update for Microsoft SharePoint Server 2019 Language Pack (KB5002872) A security vulnerability exists in Microsoft SharePoint Server 2019 Language Pack n/a Security Updates Important SharePoint Server 2019/Office Online Server
KB5089899 https://support.microsoft.com/help/5089899 https://www.catalog.update.microsoft.com/Search.aspx?q=5089899 Security Update for SQL Server 2025 RTM CU (KB5089899) Security issues have been identified in the SQL Server 2025 RTM CU that could allow an attacker to compromise your system and gain control over it. You can help protect your computer by installing this update from Microsoft. After you install this item, you may have to restart your computer. n/a Security Updates Important Microsoft SQL Server 2025
KB5089900 https://support.microsoft.com/help/5089900 https://www.catalog.update.microsoft.com/Search.aspx?q=5089900 Security Update for SQL Server 2022 RTM CU (KB5089900) Security issues have been identified in the SQL Server 2022 RTM CU that could allow an attacker to compromise your system and gain control over it. You can help protect your computer by installing this update from Microsoft. After you install this item, you may have to restart your computer. n/a Security Updates Important Microsoft SQL Server 2022
KB5090347 https://support.microsoft.com/help/5090347 https://www.catalog.update.microsoft.com/Search.aspx?q=5090347 Security Update for SQL Server 2017 RTM GDR (KB5090347) Security issues have been identified in the SQL Server 2017 RTM GDR that could allow an attacker to compromise your system and gain control over it. You can help protect your computer by installing this update from Microsoft. After you install this item, you may have to restart your computer. n/a Security Updates Important Microsoft SQL Server 2017
KB5090408 https://support.microsoft.com/help/5090408 https://www.catalog.update.microsoft.com/Search.aspx?q=5090408 Security Update for SQL Server 2019 RTM GDR (KB5090408) Security issues have been identified in the SQL Server 2019 RTM GDR that could allow an attacker to compromise your system and gain control over it. You can help protect your computer by installing this update from Microsoft. After you install this item, you may have to restart your computer. n/a Security Updates Important Microsoft SQL Server 2019
KB5089271 https://support.microsoft.com/help/5089271 https://www.catalog.update.microsoft.com/Search.aspx?q=5089271 Security Update for SQL Server 2016 Service Pack 3 GDR (KB5089271) Security issues have been identified in the SQL Server 2016 Service Pack 3 GDR that could allow an attacker to compromise your system and gain control over it. You can help protect your computer by installing this update from Microsoft. After you install this item, you may have to restart your computer. n/a Security Updates Critical Microsoft SQL Server 2016
KB5089270 https://support.microsoft.com/help/5089270 https://www.catalog.update.microsoft.com/Search.aspx?q=5089270 Security Update for SQL Server 2016 Service Pack 3 CU (KB5089270) Security issues have been identified in the SQL Server 2016 Service Pack 3 CU that could allow an attacker to compromise your system and gain control over it. You can help protect your computer by installing this update from Microsoft. After you install this item, you may have to restart your computer. n/a Security Updates Important Microsoft SQL Server 2016
KB5090354 https://support.microsoft.com/help/5090354 https://www.catalog.update.microsoft.com/Search.aspx?q=5090354 Security Update for SQL Server 2017 RTM CU (KB5090354) Security issues have been identified in the SQL Server 2017 RTM CU that could allow an attacker to compromise your system and gain control over it. You can help protect your computer by installing this update from Microsoft. After you install this item, you may have to restart your computer. n/a Security Updates Important Microsoft SQL Server 2017
KB5091158 https://support.microsoft.com/help/5091158 https://www.catalog.update.microsoft.com/Search.aspx?q=5091158 Security Update for SQL Server 2022 RTM GDR (KB5091158) Security issues have been identified in the SQL Server 2022 RTM GDR that could allow an attacker to compromise your system and gain control over it. You can help protect your computer by installing this update from Microsoft. After you install this item, you may have to restart your computer. n/a Security Updates Important Microsoft SQL Server 2022
KB5091223 https://support.microsoft.com/help/5091223 https://www.catalog.update.microsoft.com/Search.aspx?q=5091223 Security Update for SQL Server 2025 RTM GDR (KB5091223) Security issues have been identified in the SQL Server 2025 RTM GDR that could allow an attacker to compromise your system and gain control over it. You can help protect your computer by installing this update from Microsoft. After you install this item, you may have to restart your computer. n/a Security Updates Important Microsoft SQL Server 2025
KB5090407 https://support.microsoft.com/help/5090407 https://www.catalog.update.microsoft.com/Search.aspx?q=5090407 Security Update for SQL Server 2019 RTM CU (KB5090407) Security issues have been identified in the SQL Server 2019 RTM CU that could allow an attacker to compromise your system and gain control over it. You can help protect your computer by installing this update from Microsoft. After you install this item, you may have to restart your computer. n/a Security Updates Important Microsoft SQL Server 2019
