Microsoft Windows 11 23H2 Update Version OS Build 22621.7582

KB5122880 for Windows 11 version 23H2 (OS Build 22621.7582) includes the latest security fixes plus non-security improvements from KB5120240. It also updates Secure Boot certificate targeting, Morocco Standard Time, cellular profiles, OMA DM logging, and Remote Desktop audio redirection. Reference IDs: KB5027397.

• Provides security improvements for the Windows operating system.
• Includes additional high-confidence device targeting data to expand delivery of new Secure Boot certificates.

• Fixes an issue where Remote Desktop audio redirection might not play on the local computer in certain configurations.
• Improves Omadmclient logging so more debug information is saved when connecting to a server.
• Updates COSA profiles for Telavox and Swisscom.
• Adjusts Morocco Standard Time for the transition to permanent UTC+00:00 effective Sep 20, 2026.

• Use EKB KB5027397 to update to Windows 11, version 23H2.
• If previous updates are already installed, only the new updates in this package will be downloaded and installed.
• Windows 11 version 23H2 Enterprise and Education reach end of updates on Nov 10, 2026.

• Windows release health dashboard
  https://learn.microsoft.com/windows/release-health/
• Windows 11 version 23H2 release health
  https://learn.microsoft.com/windows/release-health/status-windows-11-23h2
• End of updates notice for Windows 11 version 23H2
  https://learn.microsoft.com/windows/release-health/windows11-23h2-end-of-updates

Product Information

Vendor: Microsoft

Product: Windows 11

Product type: Software

Application category: Utilities

Platform: Windows

Variant: 23H2

Version: OS Build 22621.7582

Vendor information published: Sep 8, 2026

Original release notes: View on vendor site

Published on updatealert.io: Sep 9, 2026

Description: Client operating system for modern desktop and enterprise environments.