Microsoft Windows 11 26H1 Update Version OS Build 28000.2113

KB5089548 updates Windows 11, version 26H1 to OS Build 28000.2113 with the latest security fixes, non-security improvements from prior preview releases, and servicing stack updates. It also improves SSDP reliability and game compatibility. Reference IDs: KB5083768, KB5083806, KB5092761.

• Includes the latest security fixes and addresses security vulnerabilities documented in the May 2026 Security Updates guide.

• Improves the reliability of Simple Service Discovery Protocol (SSDP) notifications to help prevent the service from becoming unresponsive.
• Improves compatibility for some games that use embedded web content and reduces the impact of JavaScript errors on in-game features.

• Microsoft is not currently aware of any issues with this update.

• If previous updates are already installed, only the new updates in this package will be downloaded and installed.
• Includes non-security updates from KB5083768 and KB5083806.
• Includes Windows 11 servicing stack update KB5092761 for OS Build 28000.2103.

• KB5089548 release notes
  https://support.microsoft.com/help/5089548

Product Information

Vendor: Microsoft

Product: Windows 11

Version: OS Build 28000.2113

Release date: May 12, 2026