September 14, 2026—KB5129235 (OS Build 26100.33451) Out-of-band

September 14, 2026—KB5129235 OS Build 26100.33451 Out-of-band Applies To Windows Server 2025, all editions This out-of-band OOB update for Windows Server 2025 KB5129235 is a non-security cumulative update. Improvements This out-of-band update contains quality improvements from KB5122871 released...

September 14, 2026—KB5129237 (OS Build 20348.5631) Out-of-band

September 14, 2026—KB5129237 OS Build 20348.5631 Out-of-band Applies To Windows Server 2022 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...

September 14, 2026, 2026—KB5129239 (OS Build 14393.9514) Out-of-band

September 14, 2026, 2026—KB5129239 OS Build 14393.9514 Out-of-band Applies To Windows Server 2016, all editions Win 10 Ent LTSB 2016 Win 10 IoT Ent LTSB 2016 Important Free support for Windows 10 Enterprise 2016 LTSB and Windows Server 2016 will soon end. For information about the availability of...

September 14, 2026—KB5129238 (OS Build 17763.9247) Out-of-band

September 14, 2026—KB5129238 OS Build 17763.9247 Out-of-band Applies To Win 10 Ent LTSC 2019 Windows Server 2019 Summary This article lists the security issues and quality improvements included in this out-of-band update. Windows Server 2019 Windows 10, version 1809 Applies to: Windows Server 201...