January 17, 2026—KB5077800 (OS Build 20348.4650) Out-of-band

January 17, 2026—KB5077800 OS Build 20348.4650 Out-of-band Applies To Windows Server 2022 This out-of-band update for Windows Server 2022 KB5077800 is cumulative. It includes updates from previous security, along with an additional fix. To learn more about differences between security updates,...

January 17, 2026—KB5077793 (OS Build 26100.32234) Out-of-band

January 17, 2026—KB5077793 OS Build 26100.32234 Out-of-band Applies To Windows Server 2025, all editions This out-of-band update for Windows Server 2025 KB5077793 is cumulative. It includes updates from previous security releases, along with an additional fix. To learn more about differences...

January 17, 2026—KB5077792 (OS Build 25398.2096) Out-of-band

January 17, 2026—KB5077792 OS Build 25398.2096 Out-of-band Applies To Windows Server, version 23H2 This out-of-band update for Windows Server 23H2 KB5077792 is cumulative. It includes updates from previous security, along with an additional fix. To learn more about differences between security...

January 17, 2026—KB5077796 (OS Builds 19045.6811 and 19044.6811) Out-of-band

January 17, 2026—KB5077796 OS Builds 19045.6811 and 19044.6811 Out-of-band Applies To Windows 10 ESU Windows 10 Enterprise LTSC 2021 Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices have started expiring in June 2026. This might affect th...

January 17, 2026—KB5077744 (OS Builds 26200.7627 and 26100.7627) Out-of-band

January 17, 2026—KB5077744 OS Builds 26200.7627 and 26100.7627 Out-of-band Applies To Windows 11 version 25H2, all editions Windows 11 version 24H2, all editions This out-of-band update for Windows 11, version 25H2 and 24H2 KB5077744 is cumulative. It includes updates from previous security and...

January 17, 2026—KB5077795 (OS Build 17763.8280) Out-of-band

January 17, 2026—KB5077795 OS Build 17763.8280 Out-of-band Applies To Win 10 Ent LTSC 2019 Windows Server 2019 Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices have started expiring in June 2026. This might affect the ability of certain...

KB5073177 - Description of the security update for SQL Server 2025 GDR: January 13, 2026

KB5073177 - Description of the security update for SQL Server 2025 GDR: January 13, 2026 Applies To SQL Server on Windows SQL Server on Linux Summary Improvements and fixes included in this update How to obtain and install the update More information File information Information about protection...

Description of the security update for Office Online Server: January 13, 2026 (KB5002824)

Description of the security update for Office Online Server: January 13, 2026 KB5002824 Applies To Office Online Server Summary This security update resolves Microsoft Excel Remote Code Execution vulnerability. To learn more about the vulnerability, see the following security advisories: Microsof...

Description of the security update for SharePoint Server 2019 Language Pack: January 13, 2026 (KB5002823)

Description of the security update for SharePoint Server 2019 Language Pack: January 13, 2026 KB5002823 Applies To SharePoint Server 2019 Summary Important If you're running 2013-type workflows, you must install the August 2025 update for SharePoint Workflow Manager to your farm before you instal...

Description of the security update for Excel 2016: January 13, 2026 (KB5002831)

Description of the security update for Excel 2016: January 13, 2026 KB5002831 Applies To Excel 2016 Summary This security update resolves Microsoft Excel Remote Code Execution Vulnerability. To learn more about the vulnerability, see the following security advisories: Microsoft Common...

Description of the security update for SharePoint Server 2019: January 13, 2026 (KB5002825)

Description of the security update for SharePoint Server 2019: January 13, 2026 KB5002825 Applies To SharePoint Server 2019 Summary Important If you're currently running SharePoint Workflow Manager, you must install the SharePoint Workflow Manager KB5002799 to your farm before you install this...

Description of the security update for SharePoint Server 2016 Language Pack: January 13, 2026 (KB5002827)

Description of the security update for SharePoint Server 2016 Language Pack: January 13, 2026 KB5002827 Applies To SharePoint Server 2016 Summary Important If you're running Microsoft SharePoint Server 2013-type workflows, you must install the August 2025 update for SharePoint Workflow Manager to...

Description of the security update for SharePoint Server Subscription Edition: January 13, 2026 (KB5002822)

Description of the security update for SharePoint Server Subscription Edition: January 13, 2026 KB5002822 Applies To SharePoint Server Subscription Edition Summary Important If you're currently running SharePoint Workflow Manager, you must install SharePoint Workflow Manager KB5002799 to your far...

Description of the security update for Office 2016: January 13, 2026 (KB5002826)

Description of the security update for Office 2016: January 13, 2026 KB5002826 Applies To Office Professional Plus 2016 Office Professional 2016 Office Standard 2016 Office Home and Business 2016 Office Home and Student 2016 Summary This security update resolves a Microsoft Office Remote Code...

End of support for Office 2016 and Office 2019

End of support for Office 2016 and Office 2019 Applies To Office 2019 Office 2016 Get help with Copilot Tell me about end of support for Office 2016 for Mac. Show me how to remove the conflicting 2013 app. Support for Office 2016 and Office 2019 ended on October 14, 2025. While your Office 2016 a...

Description of the security update for SharePoint Server 2016: January 13, 2026 (KB5002828)

Description of the security update for SharePoint Server 2016: January 13, 2026 KB5002828 Applies To SharePoint Server 2016 Summary Important If you're currently running SharePoint Workflow Manager, you must install the SharePoint Workflow Manager KB5002799 to your farm before you install this...

January 13, 2026—KB5073695 (Monthly Rollup)

January 13, 2026—KB5073695 Monthly Rollup Applies To Windows Server 2008 R2 Premium Assurance Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices have started expiring in June 2026. This might affect the ability of certain personal and...

January 13, 2026—KB5073696 (Monthly Rollup)

January 13, 2026—KB5073696 Monthly Rollup Applies To Windows Server 2012 R2 ESU Important The installation of this Extended Security Update ESU might fail when you try to install it on an Azure Arc-enabled device that is running Windows Server 2012 R2. For a successful installation, please make...

January 13, 2026—KB5073697 (Monthly Rollup)

January 13, 2026—KB5073697 Monthly Rollup Applies To Windows Server 2008 Premium Assurance Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices have started expiring in June 2026. This might affect the ability of certain personal and business...

January 13, 2026—KB5073698 (Monthly Rollup)

January 13, 2026—KB5073698 Monthly Rollup Applies To Windows Server 2012 ESU Important The installation of this Extended Security Update ESU might fail when you try to install it on an Azure Arc-enabled device that is running Windows Server 2012. For a successful installation, please make sure al...

January 13, 2026—KB5073699 (Security-only update)

January 13, 2026—KB5073699 Security-only update Applies To Windows Server 2008 R2 Premium Assurance Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices have started expiring in June 2026. This might affect the ability of certain personal and...

January 13, 2026—KB5073700 (Security-only update)

January 13, 2026—KB5073700 Security-only update Applies To Windows Server 2008 Premium Assurance Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices have started expiring in June 2026. This might affect the ability of certain personal and...

KB5072936 - Description of the security update for SQL Server 2022 CU22: January 13, 2026

KB5072936 - Description of the security update for SQL Server 2022 CU22: January 13, 2026 Applies To SQL Server 2022 on Windows all editions SQL Server 2022 on Linux all editions Summary Improvements and fixes included in this update How to obtain and install the update How to obtain or download...

KB5073031 - Description of the security update for SQL Server 2022 GDR: January 13, 2026

KB5073031 - Description of the security update for SQL Server 2022 GDR: January 13, 2026 Applies To SQL Server 2022 on Windows all editions SQL Server 2022 on Linux all editions Summary Improvements and fixes included in this update How to obtain and install the update More information File...

January 13, 2026—KB5073379 (OS Build 26100.32230)

January 13, 2026—KB5073379 OS Build 26100.32230 Applies To Windows Server 2025, all editions This cumulative update for Windows Server 2025 KB5073379, includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. To learn more abo...

January 13, 2026—KB5073450 (OS Build 25398.2092)

January 13, 2026—KB5073450 OS Build 25398.2092 Applies To Windows Server, version 23H2 This cumulative update for Windows Server, version 23H2 KB5073450, includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. To learn more...

January 13, 2026—KB5073457 (OS Build 20348.4648)

January 13, 2026—KB5073457 OS Build 20348.4648 Applies To Windows Server 2022 This cumulative update for Windows Server 2022 KB5073457, includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. To learn more about differences...

January 13, 2026—KB5073722 (OS Build 14393.8783)

January 13, 2026—KB5073722 OS Build 14393.8783 Applies To Windows Server 2016, all editions Win 10 Ent LTSB 2016 Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices have started expiring in June 2026. This might affect the ability of certain...

January 13, 2026—KB5073723 (OS Build 17763.8276)

January 13, 2026—KB5073723 OS Build 17763.8276 Applies To Windows Server 2019 Win 10 Ent LTSC 2019 Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices have started expiring in June 2026. This might affect the ability of certain personal and...

January 13, 2026—KB5073724 (OS Builds 19045.6809 and 19044.6809)

January 13, 2026—KB5073724 OS Builds 19045.6809 and 19044.6809 Applies To Windows 10 ESU Windows 10 Enterprise LTSC 2021 Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices have started expiring in June 2026. This might affect the ability of...

January 13, 2026—KB5074109 (OS Builds 26200.7623 and 26100.7623)

January 13, 2026—KB5074109 OS Builds 26200.7623 and 26100.7623 Applies To Windows 11 version 25H2, all editions Windows 11 version 24H2, all editions This cumulative update for Windows 11, version 25H2 and 24H2 KB5074109, includes the latest security fixes and improvements, along with non-securit...

January 13, 2026—KB5073455 (OS Build 22631.6491)

January 13, 2026—KB5073455 OS Build 22631.6491 Applies To Windows 11 version 23H2, all editions This cumulative update for Windows 11, version 23H2 KB5073455, includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. To learn...

.NET 8.0 Update - January 13, 2026

.NET 8.0 Update - January 13, 2026 .NET 8.0 has been refreshed with the latest update as of January 13, 2026. This update contains non-security fixes. See the release notes for details about updated packages. .NET 8.0 servicing updates are upgrades. The latest servicing update for 8.0 will remove...

.NET 10.0 Update - January 13, 2026

.NET 10.0 Update - January 13, 2026 .NET 10.0 has been refreshed with the latest update as of January 13, 2026. This update contains non-security fixes. See the release notes for details about updated packages. .NET 10.0 servicing updates are upgrades. The latest servicing update for 10.0 will...

.NET 9.0 Update - January 13, 2026

.NET 9.0 Update - January 13, 2026 .NET 9.0 has been refreshed with the latest update as of January 13, 2026. This update contains non-security fixes. See the release notes for details about updated packages. .NET 9.0 servicing updates are upgrades. The latest servicing update for 9.0 will remove...

KB5073447: Servicing stack update for Windows 10, version 1607 and Windows Server 2016: January 13, 2026

KB5073447: Servicing stack update for Windows 10, version 1607 and Windows Server 2016: January 13, 2026 Applies To Win 10 Ent LTSB 2016 Windows Server 2016, all editions Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices have started...

December 18, 2025—KB5074980 (Monthly Rollup) Out-of-band

December 18, 2025—KB5074980 Monthly Rollup Out-of-band Applies To Windows Server 2012 ESU Important The installation of this Extended Security Update ESU might fail when you try to install it on an Azure Arc-enabled device that is running Windows Server 2012. For a successful installation, please...

December 18, 2025—KB5074979 (Monthly Rollup) Out-of-band

December 18, 2025—KB5074979 Monthly Rollup Out-of-band Applies To Windows Server 2008 Premium Assurance Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices have started expiring in June 2026. This might affect the ability of certain personal...

December 18, 2025—KB5074978 (Monthly Rollup) Out-of-band

December 18, 2025—KB5074978 Monthly Rollup Out-of-band Applies To Windows Server 2012 R2 ESU Important The installation of this Extended Security Update ESU might fail when you try to install it on an Azure Arc-enabled device that is running Windows Server 2012 R2. For a successful installation,...

December 18, 2025—KB5074976 (OS Builds 19044.6693 and 19045.6693) Out-of-band

December 18, 2025—KB5074976 OS Builds 19044.6693 and 19045.6693 Out-of-band Applies To Windows 10 ESU Windows 10 Enterprise LTSC 2021 Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices have started expiring in June 2026. This might affect t...

December 18, 2025—KB5074977 (Monthly Rollup) Out-of-band

December 18, 2025—KB5074977 Monthly Rollup Out-of-band Applies To Windows Server 2008 R2 Premium Assurance Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices have started expiring in June 2026. This might affect the ability of certain...

December 18, 2025—KB5074975 (OS Build 17763.8148) Out-of-band

December 18, 2025—KB5074975 OS Build 17763.8148 Out-of-band Applies To Win 10 Ent LTSC 2019 Windows Server 2019 Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices have started expiring in June 2026. This might affect the ability of certain...

December 18, 2025—KB5074974 (OS Build 14393.8692) Out-of-band

December 18, 2025—KB5074974 OS Build 14393.8692 Out-of-band Applies To Windows Server 2016, all editions Win 10 Ent LTSB 2016 Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices have started expiring in June 2026. This might affect the abili...

KB5074204: Security Update for Windows PowerShell (OS Builds 26100.7392 and 26200.7392)

KB5074204: Security Update for Windows PowerShell OS Builds 26100.7392 and 26200.7392 Applies To Windows 11 Enterprise LTSC 2024 Windows 11 Enterprise and Education, version 24H2 Windows 11 Enterprise and Education, version 25H2 For information about Windows update terminology, see types of Windo...

KB5074353: Security Update for Windows PowerShell (OS Build 20348.4467)

KB5074353: Security Update for Windows PowerShell OS Build 20348.4467 Applies To Windows Server 2022 Datacenter: Azure Edition For information about Windows update terminology, see types of Windows updates and the monthly quality update types. To find an overview of Windows Server 2022, see the...

Description of the security update for Microsoft Exchange Server Subscription Edition RTM: December 9, 2025 (KB5071876)

Description of the security update for Microsoft Exchange Server Subscription Edition RTM: December 9, 2025 KB5071876 Applies To Exchange Server SE Original article content This security update resolves vulnerabilities in Microsoft Exchange Server. To learn more about these vulnerabilities, see t...

Description of the security update for Microsoft Exchange Server 2019 CU14: December 9, 2025 (KB5071874)

Description of the security update for Microsoft Exchange Server 2019 CU14: December 9, 2025 KB5071874 Applies To Exchange Server 2019 Original article content This security update resolves vulnerabilities in Microsoft Exchange Server. To learn more about these vulnerabilities, see the following...

Description of the security update for Microsoft Exchange Server 2019 CU15: December 9, 2025 (KB5071875)

Description of the security update for Microsoft Exchange Server 2019 CU15: December 9, 2025 KB5071875 Applies To Exchange Server 2019 Original article content This security update resolves vulnerabilities in Microsoft Exchange Server. To learn more about these vulnerabilities, see the following...

December 9, 2025—KB5071503 (Monthly Rollup)

December 9, 2025—KB5071503 Monthly Rollup Applies To Windows Server 2012 R2 ESU Important The installation of this Extended Security Update ESU might fail when you try to install it on an Azure Arc-enabled device that is running Windows Server 2012 R2. For a successful installation, please make...

December 9, 2025—KB5071505 (Monthly Rollup)

December 9, 2025—KB5071505 Monthly Rollup Applies To Windows Server 2012 ESU Important The installation of this Extended Security Update ESU might fail when you try to install it on an Azure Arc-enabled device that is running Windows Server 2012. For a successful installation, please make sure al...