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

December 18, 2025—KB5074978 Monthly Rollup Out-of-band 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 sure all Subset of endpoin...

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

December 18, 2025—KB5074977 Monthly Rollup Out-of-band Windows Secure Boot certificate expirationImportant: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-managed business devices fo...

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 Windows Secure Boot certificate expirationImportant: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-manage...

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

December 18, 2025—KB5074975 OS Build 17763.8148 Out-of-band Windows Secure Boot certificate expirationImportant: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-managed business devic...

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

December 18, 2025—KB5074980 Monthly Rollup Out-of-band 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 all Subset of endpoints...

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

December 18, 2025—KB5074974 OS Build 14393.8692 Out-of-band Windows Secure Boot certificate expirationImportant: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-managed business devic...

.NET 10.0 Update - December 9, 2025 (KB5072928)

.NET 10.0 Update - December 9, 2025 KB5072928 .NET 10.0 has been refreshed with the latest update as of December 9, 2025. 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....

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

None None...

December 9, 2025—KB5071546 (OS Builds 19045.6691 and 19044.6691)

December 9, 2025—KB5071546 OS Builds 19045.6691 and 19044.6691 Windows Secure Boot certificate expirationImportant: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-managed business...

December 9, 2025—KB5071544 (OS Build 17763.8146)

December 9, 2025—KB5071544 OS Build 17763.8146 Windows Secure Boot certificate expirationImportant: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-managed business devices for the pa...

December 9, 2025—KB5071507 (Security-only update)

December 9, 2025—KB5071507 Security-only update Windows Secure Boot certificate expirationImportant: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-managed business devices for the...

December 9, 2025—KB5071506 (Security-only update)

December 9, 2025—KB5071506 Security-only update Windows Secure Boot certificate expirationImportant: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-managed business devices for the...

December 9, 2025—KB5071504 (Monthly Rollup)

December 9, 2025—KB5071504 Monthly Rollup Windows Secure Boot certificate expirationImportant: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-managed business devices for the past...

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 Original article content This security update resolves vulnerabilities in Microsoft Exchange Server. To learn more about these vulnerabilities, see the following Common Vulnerabilities and...

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 Original article content This security update resolves vulnerabilities in Microsoft Exchange Server. To learn more about these vulnerabilities, see the following Common Vulnerabilities and...

Description of the security update for Microsoft Exchange Server 2016 CU23: December 9, 2025 (KB5071873)

Description of the security update for Microsoft Exchange Server 2016 CU23: December 9, 2025 KB5071873 Original article content This security update resolves vulnerabilities in Microsoft Exchange Server. To learn more about these vulnerabilities, see the following Common Vulnerabilities and...

December 9, 2025—Hotpatch KB5072014 (OS Build 26100.7392)

None None...

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 Original article content This security update resolves vulnerabilities in Microsoft Exchange Server. To learn more about these vulnerabilities, see the following Common...

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

None None...

November 11, 2025—KB5068905 (Monthly Rollup)

November 11, 2025—KB5068905 Monthly Rollup 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 sure all Subset of endpoints for ESU...

October 14, 2025—KB5066586 (OS Build 17763.7919)

October 14, 2025—KB5066586 OS Build 17763.7919 Windows Secure Boot certificate expirationImportant: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-managed business devices for the pa...

Description of the security update for SharePoint Server Subscription Edition: December 9, 2025 (KB5002815)

Description of the security update for SharePoint Server Subscription Edition: December 9, 2025 KB5002815 Summary Important: If you're currently running SharePoint Workflow Manager, you must install SharePoint Workflow Manager KB5002799 to your farm before you install this cumulative update. If...

Description of the security update for Office 2016: December 9, 2025 (KB5002812)

Description of the security update for Office 2016: December 9, 2025 KB5002812 Summary This security update resolves a Microsoft Access Remote Code Execution vulnerability. To learn more about the vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2025-62552. ​​​​​​​ Note: To...

Description of the security update for SharePoint Server 2016: December 9, 2025 (KB5002821)

Description of the security update for SharePoint Server 2016: December 9, 2025 KB5002821 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 cumulative update. If you're...

Description of the security update for SharePoint Server 2019 Language Pack: December 9, 2025 (KB5002802)

Description of the security update for SharePoint Server 2019 Language Pack: December 9, 2025 KB5002802 Summary Important: If you're running 2013-type workflows, you mustinstall the August 2025 update for SharePoint Workflow Manager to your farm before you install this cumulative update.​​​​​​​ I...

Description of the security update for SharePoint Server 2019: December 9, 2025 (KB5002816)

Description of the security update for SharePoint Server 2019: December 9, 2025 KB5002816 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 cumulative update. If you're...

End of support for Office 2016 and Office 2019

None None...

Description of the security update for SharePoint Server 2016 Language Pack: December 9, 2025 (KB5002804)

Description of the security update for SharePoint Server 2016 Language Pack: December 9, 2025 KB5002804 Summary Important: If you're running Microsoft SharePoint Server 2013-type workflows, you must install the August 2025 update for SharePoint Workflow Manager to your farm before you install thi...

Description of the security update for Office 2016: December 9, 2025 (KB5002818)

Description of the security update for Office 2016: December 9, 2025 KB5002818 Summary This security update resolves a Microsoft Excel Remote Code Execution vulnerability. To learn more about the vulnerability, see the following security advisories: Microsoft Common Vulnerabilities and Exposures...

Description of the security update for Office Online Server: December 9, 2025 (KB5002817)

Description of the security update for Office Online Server: December 9, 2025 KB5002817 Summary This security update resolves Microsoft Excel Remote Code Execution vulnerability. To learn more about the vulnerability, see the following security advisories: Microsoft Common Vulnerabilities and...

Description of the security update for Excel 2016: December 9, 2025 (KB5002820)

Description of the security update for Excel 2016: December 9, 2025 KB5002820 Summary This security update resolves Microsoft Excel Remote Code Execution Vulnerability. To learn more about the vulnerability, see the following security advisories: Microsoft Common Vulnerabilities and Exposures...

Description of the security update for Office 2016: December 9, 2025 (KB5002819)

Description of the security update for Office 2016: December 9, 2025 KB5002819 Summary This security update resolves a Microsoft Office Remote Code Execution vulnerability. To learn more about the vulnerability, see the following security advisories: Microsoft Common Vulnerabilities and Exposures...

November 11, 2025—KB5068781 (OS Builds 19044.6575 and 19045.6575)

November 11, 2025—KB5068781 OS Builds 19044.6575 and 19045.6575 Windows Secure Boot certificate expirationImportant: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-managed business...

November 11, 2025—KB5068791 (OS Build 17763.8027)

November 11, 2025—KB5068791 OS Build 17763.8027 Windows Secure Boot certificate expirationImportant: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-managed business devices for the...

December 9, 2025—KB5071503 (Monthly Rollup)

December 9, 2025—KB5071503 Monthly Rollup 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 sure all Subset of endpoints for ESU on...

November 11, 2025—Hotpatch KB5068966 (OS Build 26100.7092)

None None...

November 11, 2025—KB5068906 (Monthly Rollup)

November 11, 2025—KB5068906 Monthly Rollup Windows Secure Boot certificate expirationImportant: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-managed business devices for the past...

November 11, 2025—KB5068909 (Security-only update)

November 11, 2025—KB5068909 Security-only update Windows Secure Boot certificate expirationImportant: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-managed business devices for the...

November 11, 2025—KB5068908 (Security-only update)

November 11, 2025—KB5068908 Security-only update Windows Secure Boot certificate expirationImportant: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-managed business devices for the...

December 9, 2025—Hotpatch KB5071413 (OS Build 20348.4467)

None None...

December 9, 2025—KB5071501 (Monthly Rollup)

December 9, 2025—KB5071501 Monthly Rollup Windows Secure Boot certificate expirationImportant: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-managed business devices for the past...

December 9, 2025—KB5071543 (OS Build 14393.8688)

December 9, 2025—KB5071543 OS Build 14393.8688 Windows Secure Boot certificate expirationImportant: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-managed business devices for the pa...

December 9, 2025—KB5072033 (OS Builds 26200.7462 and 26100.7462)

December 9, 2025—KB5072033 OS Builds 26200.7462 and 26100.7462 ​​​​​This cumulative update for Windows 11, version 25H2 and 24H2 KB5072033, includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. To learn more about...

November 11, 2025—KB5068779 (OS Build 25398.1965)

November 11, 2025—KB5068779 OS Build 25398.1965 This cumulative update for Windows Server, version 23H2 KB5068779, includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. To learn more about differences between security...

November 11, 2025—KB5068787 (OS Build 20348.4405)

November 11, 2025—KB5068787 OS Build 20348.4405 This cumulative update for Windows Server 2022 KB5068787, includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. To learn more about differences between security updates,...

November 11, 2025—KB5068864 (OS Build 14393.8594)

November 11, 2025—KB5068864 OS Build 14393.8594 Windows Secure Boot certificate expirationImportant: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-managed business devices for the...

November 11, 2025—KB5068904 (Monthly Rollup)

November 11, 2025—KB5068904 Monthly Rollup Windows Secure Boot certificate expirationImportant: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-managed business devices for the past...

October 14, 2025—KB5066835 (OS Builds 26200.6899 and 26100.6899)

October 14, 2025—KB5066835 OS Builds 26200.6899 and 26100.6899 Windows Secure Boot certificate expirationImportant: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-managed business...

October 14, 2025—KB5066782 (OS Build 20348.4294)

October 14, 2025—KB5066782 OS Build 20348.4294 Windows Secure Boot certificate expirationImportant: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-managed business devices for the pa...

October 14, 2025—KB5066780 (OS Build 25398.1913)

October 14, 2025—KB5066780 OS Build 25398.1913 Windows Secure Boot certificate expirationImportant: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-managed business devices for the pa...