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Update Summary

KB5120240 for Windows 11, version 23H2 (OS Build 22631.7517) includes the latest security fixes and quality improvements from KB5099414. It also refreshes Secure Boot certificate targeting, improves MDM and File History reliability, and adds GIPHY support in the emoji panel. Reference IDs: KB5027397.

Update Details

Security

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

Bug Fixes

  • Improves reliability for devices managed through MDM when an MDM certificate expires.
  • Improves File History backups to SMB network shares so scheduled backups can access network locations and copy files as expected.
  • Refreshes the COSA profile for SolNet-Mobile to support updated mobile operator settings.

New Features

  • Emoji panel now supports GIPHY after the deprecation of Google's Tenor API.

Hints

  • Use EKB KB5027397 to update to Windows 11, version 23H2.
  • If previous updates are 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 November 10, 2026.

Links

Product Information

Vendor: Microsoft

Product: Windows 11

Product type: Software

Application category: Utilities

Platform: Windows

Variant: 23H2

Version: OS Build 22631.7517

Vendor release date: Aug 11, 2026

Original release notes: View on vendor site

Published on updatealert.io: Aug 12, 2026

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