June 23, 2026—KB5095093 (OS Builds 26200.8737 and 26100.8737) Preview

June 23, 2026—KB5095093 OS Builds 26200.8737 and 26100.8737 Preview ​​​​This cumulative update for Windows 11, version 25H2 and 24H2 KB5095093, includes production-quality improvements. Announcements and messages This section provides key notifications related to this release, including...

June 9, 2026—KB5094125 (OS Build 26100.32995)

June 9, 2026—KB5094125 OS Build 26100.32995 ​​​​​This cumulative update for Windows Server 2025 KB5094125, 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,...

May 12, 2026—KB5087539(OS Build 26100.32860)

May 12, 2026—KB5087539OS Build 26100.32860 ​​​​​This cumulative update for Windows Server 2025 KB5087539, 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,...

May 12, 2026—KB5089549 (OS Builds 26200.8457 and 26100.8457)

May 12, 2026—KB5089549 OS Builds 26200.8457 and 26100.8457 This cumulative update for Windows 11, version 25H2 and 24H2 KB5089549 includes the latest security fixes and improvements, along with non-security updates from last month's optional preview release.Visit the Windows release health...

May 26, 2026—KB5089573 (OS Builds 26200.8524 and 26100.8524) Preview

May 26, 2026—KB5089573 OS Builds 26200.8524 and 26100.8524 Preview ​​​​This cumulative update for Windows 11, version 25H2 and 24H2 KB5089573, includes production-quality improvements. Visit the Windows release health dashboard for the latest status on this release. Announcements and messages Thi...

May 12, 2026—KB5087541 (OS Build 25398.2330)

May 12, 2026—KB5087541 OS Build 25398.2330 This cumulative update for Windows Server, version 23H2 KB5087541, 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,...

May 12, 2026—KB5087544 (OS Builds 19045.7291 and 19044.7291)

May 12, 2026—KB5087544 OS Builds 19045.7291 and 19044.7291 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 device...

March 10, 2026—Hotpatch KB5078737 (OS Build 20348.4830)

None None...

May 12, 2026—KB5087545 (OS Build 20348.5139)

May 12, 2026—KB5087545 OS Build 20348.5139 This cumulative update for Windows Server 2022 KB5087545, 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, optional...

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—KB5091575 (OS Build 20348.5024) Out-of-band

April 19, 2026—KB5091575 OS Build 20348.5024 Out-of-band ​​​​​​​Announcements and messages This section provides key notifications related to this release, including announcements, change logs, and end-of-support notices. Windows Secure Boot certificate expiration Windows Secure Boot certificate...

April 19, 2026—KB5091573 (OS Build 17763.8647) Out-of-band

April 19, 2026—KB5091573 OS Build 17763.8647 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...

April 14, 2026—KB5082052 (OS Build 22631.6936)

April 14, 2026—KB5082052 OS Build 22631.6936 ​​​​​This cumulative update for Windows 11, version 23H2 KB5082052, 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 update...

April 14, 2026—KB5082063(OS Build 26100.32690)

April 14, 2026—KB5082063OS Build 26100.32690 ​​​​​This cumulative update for Windows Server 2025 KB5082063, 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,...

March 10, 2026—KB5078752 (OS Build 17763.8511)

March 10, 2026—KB5078752 OS Build 17763.8511 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...

March 10, 2026—KB5078885 (OS Builds 19045.7058 and 19044.7058)

March 10, 2026—KB5078885 OS Builds 19045.7058 and 19044.7058 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...

March 10, 2026—KB5079473 (OS Builds 26200.8037 and 26100.8037)

March 10, 2026—KB5079473 OS Builds 26200.8037 and 26100.8037 This cumulative update for Windows 11, version 25H2 and 24H2 KB5079473, includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. To learn more about differences...

March 10, 2026—KB5078766 (OS Build 20348.4893)

March 10, 2026—KB5078766 OS Build 20348.4893 This cumulative update for Windows Server 2022 KB5078766, 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, optiona...

March 10, 2026—KB5078734 (OS Build 25398.2207)

March 10, 2026—KB5078734 OS Build 25398.2207 This cumulative update for Windows Server, version 23H2 KB5078734, 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...

MGASA-2026-0035 Updated golang packages fix security vulnerabilities

net/http: memory exhaustion in Request.ParseForm. CVE-2025-61726 archive/zip: denial of service when parsing arbitrary ZIP archives. CVE-2025-61728 crypto/tls: handshake messages may be processed at the incorrect encryption level. CVE-2025-61730 cmd/go: bypass of flag sanitization can lead to...