Microsoft Patches Released
Below is a list of patches released by Microsoft January, 2026.
articleID supportURL UpdateName Description Architecture Classification Severity SupportedProducts
KB5074109 https://support.microsoft.com/help/5074109 https://www.catalog.update.microsoft.com/Search.aspx?q=5074109 2026-01 Cumulative Update for Windows 11 Version 24H2 for x64-based Systems (KB5074109) (26100.7623) 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
KB5074109 https://support.microsoft.com/help/5074109 https://www.catalog.update.microsoft.com/Search.aspx?q=5074109 2026-01 Cumulative Update for Windows 11, version 25H2 for arm64-based Systems (KB5074109) (26200.7623) 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
KB5074109 https://support.microsoft.com/help/5074109 https://www.catalog.update.microsoft.com/Search.aspx?q=5074109 2026-01 Cumulative Update for Windows 11 Version 24H2 for arm64-based Systems (KB5074109) (26100.7623) 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
KB5074109 https://support.microsoft.com/help/5074109 https://www.catalog.update.microsoft.com/Search.aspx?q=5074109 2026-01 Cumulative Update for Windows 11, version 25H2 for x64-based Systems (KB5074109) (26200.7623) 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
KB5073723 https://support.microsoft.com/help/5073723 https://www.catalog.update.microsoft.com/Search.aspx?q=5073723 2026-01 Cumulative Update for Windows 10 Version 1809 for x86-based Systems (KB5073723) 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
KB5073723 https://support.microsoft.com/help/5073723 https://www.catalog.update.microsoft.com/Search.aspx?q=5073723 2026-01 Cumulative Update for Windows 10 Version 1809 for x64-based Systems (KB5073723) 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
KB5073723 https://support.microsoft.com/help/5073723 https://www.catalog.update.microsoft.com/Search.aspx?q=5073723 2026-01 Cumulative Update for Windows Server 2019 for x64-based Systems (KB5073723) 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
KB5073457 https://support.microsoft.com/help/5073457 https://www.catalog.update.microsoft.com/Search.aspx?q=5073457 2026-01 Cumulative Update for Microsoft server operating system version 21H2 for x64-based Systems (KB5073457) 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. AMD64 Security Updates Critical Microsoft Server operating system-21H2
KB5073724 https://support.microsoft.com/help/5073724 https://www.catalog.update.microsoft.com/Search.aspx?q=5073724 2026-01 Cumulative Update for Windows 10 Version 22H2 for ARM64-based Systems (KB5073724) 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. ARM64 Security Updates Critical Windows 10, version 1903 and later
KB5073724 https://support.microsoft.com/help/5073724 https://www.catalog.update.microsoft.com/Search.aspx?q=5073724 2026-01 Cumulative Update for Windows 10 Version 21H2 for x64-based Systems (KB5073724) 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. AMD64 Security Updates Critical Windows 10 LTSB
KB5073724 https://support.microsoft.com/help/5073724 https://www.catalog.update.microsoft.com/Search.aspx?q=5073724 2026-01 Cumulative Update for Windows 10 Version 21H2 for x86-based Systems (KB5073724) 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. X86 Security Updates Critical Windows 10 LTSB
KB5073724 https://support.microsoft.com/help/5073724 https://www.catalog.update.microsoft.com/Search.aspx?q=5073724 2026-01 Dynamic Cumulative Update for Windows 10 Version 21H2 for x64-based Systems (KB5073724) 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
KB5073724 https://support.microsoft.com/help/5073724 https://www.catalog.update.microsoft.com/Search.aspx?q=5073724 2026-01 Cumulative Update for Windows 10 Version 22H2 for x64-based Systems (KB5073724) 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. AMD64 Security Updates Critical Windows 10, version 1903 and later
KB5073724 https://support.microsoft.com/help/5073724 https://www.catalog.update.microsoft.com/Search.aspx?q=5073724 2026-01 Cumulative Update for Windows 10 Version 22H2 for x86-based Systems (KB5073724) 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. X86 Security Updates Critical Windows 10, version 1903 and later
KB5073724 https://support.microsoft.com/help/5073724 https://www.catalog.update.microsoft.com/Search.aspx?q=5073724 2026-01 Dynamic Cumulative Update for Windows 10 Version 21H2 for x86-based Systems (KB5073724) 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
KB5073724 https://support.microsoft.com/help/5073724 https://www.catalog.update.microsoft.com/Search.aspx?q=5073724 2026-01 Cumulative Update for Windows 10 Version 21H2 for ARM64-based Systems (KB5073724) 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. ARM64 Security Updates Critical Windows 10 LTSB
KB5073724 https://support.microsoft.com/help/5073724 https://www.catalog.update.microsoft.com/Search.aspx?q=5073724 2026-01 Dynamic Cumulative Update for Windows 10 Version 21H2 for ARM64-based Systems (KB5073724) 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
KB5073379 https://support.microsoft.com/help/5073379 https://www.catalog.update.microsoft.com/Search.aspx?q=5073379 2026-01 Cumulative Update for Microsoft server operating system version 24H2 for x64-based Systems (KB5073379) (26100.32230) 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
KB5073455 https://support.microsoft.com/help/5073455 https://www.catalog.update.microsoft.com/Search.aspx?q=5073455 2026-01 Cumulative Update for Windows 11 Version 23H2 for x64-based Systems (KB5073455) 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
KB5073455 https://support.microsoft.com/help/5073455 https://www.catalog.update.microsoft.com/Search.aspx?q=5073455 2026-01 Cumulative Update for Windows 11 Version 23H2 for arm64-based Systems (KB5073455) 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
KB5073450 https://support.microsoft.com/help/5073450 https://www.catalog.update.microsoft.com/Search.aspx?q=5073450 2026-01 Cumulative Update for Microsoft server operating system version 23H2 for x64-based Systems (KB5073450) 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
KB5073722 https://support.microsoft.com/help/5073722 https://www.catalog.update.microsoft.com/Search.aspx?q=5073722 2026-01 Cumulative Update for Windows Server 2016 for x64-based Systems (KB5073722) 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
KB5073722 https://support.microsoft.com/help/5073722 https://www.catalog.update.microsoft.com/Search.aspx?q=5073722 2026-01 Cumulative Update for Windows 10 Version 1607 for x86-based Systems (KB5073722) 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
KB5073722 https://support.microsoft.com/help/5073722 https://www.catalog.update.microsoft.com/Search.aspx?q=5073722 2026-01 Cumulative Update for Windows 10 Version 1607 for x64-based Systems (KB5073722) 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
KB5073698 https://support.microsoft.com/help/5073698 https://www.catalog.update.microsoft.com/Search.aspx?q=5073698 2026-01 Security Monthly Quality Rollup for Windows Server 2012 for x64-based Systems (KB5073698) 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
KB5073696 https://support.microsoft.com/help/5073696 https://www.catalog.update.microsoft.com/Search.aspx?q=5073696 2026-01 Security Monthly Quality Rollup for Windows Server 2012 R2 for x64-based Systems (KB5073696) 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
KB5073697 https://support.microsoft.com/help/5073697 https://www.catalog.update.microsoft.com/Search.aspx?q=5073697 2026-01 Security Monthly Quality Rollup for Windows Server 2008 for x64-based Systems (KB5073697) 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 2008
KB5073697 https://support.microsoft.com/help/5073697 https://www.catalog.update.microsoft.com/Search.aspx?q=5073697 2026-01 Security Monthly Quality Rollup for Windows Server 2008 for x86-based Systems (KB5073697) 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 Server 2008
KB5073700 https://support.microsoft.com/help/5073700 https://www.catalog.update.microsoft.com/Search.aspx?q=5073700 2026-01 Security Only Quality Update for Windows Server 2008 for x86-based Systems (KB5073700) 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 Server 2008
KB5073700 https://support.microsoft.com/help/5073700 https://www.catalog.update.microsoft.com/Search.aspx?q=5073700 2026-01 Security Only Quality Update for Windows Server 2008 for x64-based Systems (KB5073700) 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 2008
KB5073695 https://support.microsoft.com/help/5073695 https://www.catalog.update.microsoft.com/Search.aspx?q=5073695 2026-01 Security Monthly Quality Rollup for Windows Server 2008 R2 for x64-based Systems (KB5073695) 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 2008 R2
KB5073699 https://support.microsoft.com/help/5073699 https://www.catalog.update.microsoft.com/Search.aspx?q=5073699 2026-01 Security Only Quality Update for Windows Server 2008 R2 for x64-based Systems (KB5073699) 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 2008 R2
KB5073031 https://support.microsoft.com/help/5073031 https://www.catalog.update.microsoft.com/Search.aspx?q=5073031 Security Update for SQL Server 2022 RTM GDR (KB5073031) 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
KB5073177 https://support.microsoft.com/help/5073177 https://www.catalog.update.microsoft.com/Search.aspx?q=5073177 Security Update for SQL Server 2025 RTM GDR (KB5073177) 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
KB5072936 https://support.microsoft.com/help/5072936 https://www.catalog.update.microsoft.com/Search.aspx?q=5072936 Security Update for SQL Server 2022 RTM CU (KB5072936) 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
KB5002825 https://support.microsoft.com/help/5002825 https://www.catalog.update.microsoft.com/Search.aspx?q=5002825 Security Update for Microsoft SharePoint Server 2019 Core (KB5002825) A security vulnerability exists in Microsoft SharePoint Server 2019 Core n/a Security Updates Important SharePoint Server 2019/Office Online Server
KB5002826 https://support.microsoft.com/help/5002826 https://www.catalog.update.microsoft.com/Search.aspx?q=5002826 Security Update for Microsoft Office 2016 (KB5002826) 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
KB5002826 https://support.microsoft.com/help/5002826 https://www.catalog.update.microsoft.com/Search.aspx?q=5002826 Security Update for Microsoft Office 2016 (KB5002826) 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
KB5002828 https://support.microsoft.com/help/5002828 https://www.catalog.update.microsoft.com/Search.aspx?q=5002828 Security Update for Microsoft SharePoint Enterprise Server 2016 (KB5002828) A security vulnerability exists in Microsoft SharePoint Enterprise Server 2016 n/a Security Updates Important Office 2016
KB5002822 https://support.microsoft.com/help/5002822 https://www.catalog.update.microsoft.com/Search.aspx?q=5002822 Security Update for Microsoft SharePoint Server Subscription Edition (KB5002822) A security vulnerability exists in Microsoft SharePoint Server Subscription Edition n/a Security Updates Important SharePoint Server Subscription Edition
KB5002831 https://support.microsoft.com/help/5002831 https://www.catalog.update.microsoft.com/Search.aspx?q=5002831 Security Update for Microsoft Excel 2016 (KB5002831) 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
KB5002831 https://support.microsoft.com/help/5002831 https://www.catalog.update.microsoft.com/Search.aspx?q=5002831 Security Update for Microsoft Excel 2016 (KB5002831) 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
KB5002824 https://support.microsoft.com/help/5002824 https://www.catalog.update.microsoft.com/Search.aspx?q=5002824 Security Update for Microsoft Office Online Server (KB5002824) A security vulnerability exists in Microsoft Office Online Server n/a Security Updates Important SharePoint Server 2019/Office Online Server
KB5002827 https://support.microsoft.com/help/5002827 https://www.catalog.update.microsoft.com/Search.aspx?q=5002827 Security Update for Microsoft SharePoint Enterprise Server 2016 (KB5002827) A security vulnerability exists in Microsoft SharePoint Enterprise Server 2016 n/a Security Updates Important Office 2016
KB5002823 https://support.microsoft.com/help/5002823 https://www.catalog.update.microsoft.com/Search.aspx?q=5002823 Security Update for Microsoft SharePoint Server 2019 Language Pack (KB5002823) A security vulnerability exists in Microsoft SharePoint Server 2019 Language Pack n/a Security Updates Important SharePoint Server 2019/Office Online Server
KB5002829 https://support.microsoft.com/help/5002829 https://www.catalog.update.microsoft.com/Search.aspx?q=5002829 Security Update for Microsoft Word 2016 (KB5002829) 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
KB5002829 https://support.microsoft.com/help/5002829 https://www.catalog.update.microsoft.com/Search.aspx?q=5002829 Security Update for Microsoft Word 2016 (KB5002829) 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
