October 14, 2025—KB5066791 (OS Builds 19044.6456 and 19045.6456)

October 14, 2025—KB5066791 OS Builds 19044.6456 and 19045.6456 Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot secure...

November 11, 2025—KB5068904 (Monthly Rollup)

November 11, 2025—KB5068904 Monthly Rollup Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not updated in...

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 expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot...

December 9, 2025—KB5071544 (OS Build 17763.8146)

December 9, 2025—KB5071544 OS Build 17763.8146 Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not update...

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

December 9, 2025—KB5071507 Security-only update Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not updat...

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...

October 14, 2025—KB5066836 (OS Build 14393.8519)

October 14, 2025—KB5066836 OS Build 14393.8519 Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not update...

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...

December 9, 2025—KB5071505 (Monthly Rollup)

December 9, 2025—KB5071505 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. For a successful installation, please make sure all Subset of endpoints for ESU only...

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—KB5068865 (OS Build 22631.6199)

November 11, 2025—KB5068865 OS Build 22631.6199 ​​​​​This cumulative update for Windows 11, version 23H2 KB5068865, 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,...

October 14, 2025—KB5066837 (OS Build 10240.21161)

October 14, 2025—KB5066837 OS Build 10240.21161 Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not updat...

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...

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...

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 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 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 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...

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 For information about Windows update terminology, see types of Windows updates and the monthly quality update types. To find an overview of Windows 11, see the update history pages for Windows 11, version 24H2 a...

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...

December 9, 2025—KB5071501 (Monthly Rollup)

December 9, 2025—KB5071501 Monthly Rollup Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not updated in...

November 11, 2025—KB5068864 (OS Build 14393.8594)

November 11, 2025—KB5068864 OS Build 14393.8594 Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not updat...

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

November 11, 2025—KB5068909 Security-only update Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not...

November 11, 2025—Hotpatch KB5068840 (OS Build 20348.4346)

November 11, 2025—Hotpatch KB5068840 OS Build 20348.4346 To learn more about differences between security updates, optional non-security preview updates, out-of-band OOB updates, and continuous innovation, see Windows monthly updates explained. For information on Windows update terminology, see t...

October 14, 2025—KB5066793 (OS Builds 22621.6060 and 22631.6060)

October 14, 2025—KB5066793 OS Builds 22621.6060 and 22631.6060 Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot secure...

November 11, 2025—KB5068907 (Monthly Rollup)

November 11, 2025—KB5068907 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. For a successful installation, please make sure all Subset of endpoints for ESU only...

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

December 9, 2025—Hotpatch KB5072014 OS Build 26100.7392 This update applies to Windows Server 2025 Datacenter & Standard machines connected to Azure Arc. To learn more about differences between security updates, optional non-security preview updates, out-of-band OOB updates, and continuous...

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...

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...

November 11, 2025—KB5068906 (Monthly Rollup)

November 11, 2025—KB5068906 Monthly Rollup Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not updated in...

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

December 9, 2025—KB5071506 Security-only update Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not updat...

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

November 11, 2025—KB5068908 Security-only update Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not...

November 11, 2025—KB5068791 (OS Build 17763.8027)

November 11, 2025—KB5068791 OS Build 17763.8027 Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not updat...

October 14, 2025—KB5066782 (OS Build 20348.4294)

October 14, 2025—KB5066782 OS Build 20348.4294 Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not update...

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...

October 14, 2025—KB5066780 (OS Build 25398.1913)

October 14, 2025—KB5066780 OS Build 25398.1913 Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not update...

December 1, 2025—KB5070311 (OS Builds 26200.7309 and 26100.7309) Preview

December 1, 2025—KB5070311 OS Builds 26200.7309 and 26100.7309 Preview ​​​​​This non-security update for Windows 11, version 25H2 and 24H2 KB5070311, improves functionality, performance, and reliability. To learn more about differences between security updates, optional non-security preview...

Update Rollup 1 for System Center 2025 Data Protection Manager

Update Rollup 1 for System Center 2025 Data Protection Manager Applies to: System Center 2025 Data Protection Manager Introduction This article describes the new features and issues that are fixed in Update Rollup 1 for Microsoft System Center Data Protection Manager 2025. It also contains the...

November 20, 2025—KB5070312 (OS Build 22631.6276) Preview

November 20, 2025—KB5070312 OS Build 22631.6276 Preview ​​​​​This non-security update for Windows 11, version 23H2 KB5070312, improves functionality, performance, and reliability. To learn more about differences between security updates, optional non-security preview updates, Out-of-band OOB...

November 18, 2025—KB5072359 (OS Build 26100.7178) Out-of-band

November 18, 2025—KB5072359 OS Build 26100.7178 Out-of-band ​​​​This out-of-band update for Windows Server 2025 KB5072359 is cumulative. It includes updates from previous security and non-security releases, along with an additional fix. To learn more about differences between security updates,...

KB5072653: Extended Security Updates (ESU) Licensing Preparation Package for Windows 10

KB5072653: Extended Security Updates ESU Licensing Preparation Package for Windows 10 Introduction The Windows 10 Extended Security Updates ESU program gives customers the option to receive security updates for PCs enrolled in the program. ESU is a paid program that provides individuals and...

KB5068405 - Description of the security update for SQL Server 2019 GDR: November 11, 2025

KB5068405 - Description of the security update for SQL Server 2019 GDR: November 11, 2025 Summary Improvements and fixes included in this update How to obtain and install the update More information File information Information about protection and security Summary This security update contains...

KB5068402 - Description of the security update for SQL Server 2017 CU31: November 11, 2025

KB5068402 - Description of the security update for SQL Server 2017 CU31: November 11, 2025 Summary Improvements and fixes included in this update How to obtain and install the update More information File information Information about protection and security Summary This security update contains...

KB5068406 - Description of the security update for SQL Server 2022 CU21: November 11, 2025

KB5068406 - Description of the security update for SQL Server 2022 CU21: November 11, 2025 Summary Improvements and fixes included in this update How to obtain and install the update How to obtain or download the latest cumulative update package for Linux More information File information...

Description of the security update for Excel 2016: November 11, 2025 (KB5002811)

Description of the security update for Excel 2016: November 11, 2025 KB5002811 Summary This security update resolves Microsoft Excel Information Disclosure Vulnerability and Microsoft Excel Remote Code Execution Vulnerability. To learn more about the vulnerabilities, see the following security...

Description of the security update for SharePoint Server 2016: November 11, 2025 (KB5002805)

Description of the security update for SharePoint Server 2016: November 11, 2025 KB5002805 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: November 11, 2025 (KB5002803)

Description of the security update for SharePoint Server 2019: November 11, 2025 KB5002803 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...

KB5068403 - Description of the security update for SQL Server 2017 GDR: November 11, 2025

KB5068403 - Description of the security update for SQL Server 2017 GDR: November 11, 2025 Summary Improvements and fixes included in this update How to obtain and install the update More information File information Information about protection and security Summary This security update contains...