May 12, 2026—KB5089548 (OS Build 28000.2113)

May 12, 2026—KB5089548 OS Build 28000.2113 ​​​​​This cumulative update for Windows 11, version 26H1 KB5089548 includes the latest security fixes and improvements, along with non-security updates from last month's optional preview release. Visit the Windows release health dashboard for the latest...

KB5088064: Servicing stack update for Windows 10, version 1607 and Windows Server 2016: May 12, 2026

KB5088064: Servicing stack update for Windows 10, version 1607 and Windows Server 2016: May 12, 2026 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 o...

April 19, 2026—KB5091571 (OS Build 25398.2276) Out-of-band

April 19, 2026—KB5091571 OS Build 25398.2276 Out-of-band Summary This out-of-band update for Windows Server, version 23H2 KB5091571 is cumulative. It includes fixes and improvements that are part of the following update: April 14, 2026—KB5082060 OS Build 25398.2274 The following is a summary of t...

April 19, 2026—KB5091157 (OS Build 26100.32698) Out-of-band

April 19, 2026—KB5091157 OS Build 26100.32698 Out-of-band ​​​​This out-of-band OOB update for Windows Server 2025 KB5091157 is a non-security cumulative update. Improvements This out-of-band update contains quality improvements from KB5082063 released April 14, 2026. The following summary outline...

KB5075902: Servicing stack update for Windows 10, version 1607 and Windows Server 2016: February 10, 2026

KB5075902: Servicing stack update for Windows 10, version 1607 and Windows Server 2016: February 10, 2026 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...

January 24, 2026—KB5078136 (OS Build 20348.4651) Out-of-band

January 24, 2026—KB5078136 OS Build 20348.4651 Out-of-band This out-of-band update for Windows Server 2022 KB5078136 is cumulative. It includes updates from previous security, along with an additional fix. To learn more about differences between security updates, optional non-security preview...

January 24, 2026—KB5078135 (OS Build 26100.32236) Out-of-band

January 24, 2026—KB5078135 OS Build 26100.32236 Out-of-band ​​​​This out-of-band update for Windows Server 2025 KB5078135 is cumulative. It includes updates from previous security releases, along with an additional fix. To learn more about differences between security updates, optional non-securi...

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

January 17, 2026—KB5077800 OS Build 20348.4650 Out-of-band ​​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, optional non-security preview...

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

January 17, 2026—KB5077792 OS Build 25398.2096 Out-of-band ​​​​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 updates, optional non-security preview...

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 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 certificat...

KB5068783: Servicing stack update for Windows Server 2012 R2: November 11, 2025

KB5068783: Servicing stack update for Windows Server 2012 R2: November 11, 2025 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...

KB5066795: Servicing stack update for Windows Server 2012: October 14, 2025

KB5066795: Servicing stack update for Windows Server 2012: October 14, 2025 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...

KB5066794: Servicing stack update for Windows Server 2012 R2: October 14, 2025

KB5066794: Servicing stack update for Windows Server 2012 R2: October 14, 2025 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...

KB5066584: Servicing stack update for Windows 10, version 1607 and Windows Server 2016: October 14, 2025

KB5066584: Servicing stack update for Windows 10, version 1607 and Windows Server 2016: October 14, 2025 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 certificat...

KB5065767: Servicing stack update for Windows Server 2012 R2: September 9, 2025

KB5065767: Servicing stack update for Windows Server 2012 R2: September 9, 2025 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...

May 13, 2025—KB5058411 (OS Build 26100.4061)

May 13, 2025—KB5058411 OS Build 26100.4061 For information about Windows update terminology, see types of Windows updates and the monthly quality update types. To find an overview of Windows 11, version 24H2, see its update history page. Be sure to follow @WindowsUpdate to find out when new conte...

May 13, 2025—KB5058384 (OS Build 25398.1611)

May 13, 2025—KB5058384 OS Build 25398.1611 For information about Windows update terminology, see types of Windows updates and the monthly quality update types. To find an overview of Windows Server, version 23H2, see its update history page. Improvements This security update includes quality...

August 12, 2025—Hotpatch KB5064010 (OS Build 26100.4851)

August 12, 2025—Hotpatch KB5064010 OS Build 26100.4851 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...

August 12, 2025—KB5063899 (OS Build 25398.1791)

August 12, 2025—KB5063899 OS Build 25398.1791 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 pas...

August 12, 2025—KB5063880 (OS Build 20348.4052)

August 12, 2025—KB5063880 OS Build 20348.4052 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 pas...