Windows 11 May 2026 Patch Tuesday Update, KB5089549, Out Now

Microsoft has just released May 2026 Patch Tuesday update, KB5089549, for Windows 11 version 25H2 and 24H2 that bumps respective systems to Build 26200.8457 and 26100.8457. Microsoft has confirmed that the latest Patch Tuesday update includes fixes and improvements previously released through KB5083769 and KB5083631 Preview updates last month.

Notably, the company has also confirmed that KB5089549 May 2026 Patch Tuesday update fixes 137 vulnerabilities that are detailed here. As far as the quality improvements is concerned, check the changelog for the update below:

• [Secure Boot] With this update, Windows quality updates include additional high confidence device targeting data, increasing coverage of devices eligible to automatically receive new Secure Boot certificates. Devices receive the new certificates only after demonstrating sufficient successful update signals, maintaining a controlled and phased rollout. ​​​​​​​
• [Boot manager servicing update]
  • This update improves startup reliability after boot file updates, so devices start normally without entering BitLocker recovery.
  • (Known issue) Fixed: This update addresses an issue where some devices might enter BitLocker Recovery after updating boot files on systems with certain Trusted Platform Module (TPM) validation settings, including invalid PCR7 (Platform Configuration Register 7) configurations. This might occur after installing the April 2026 security update (KB5083769).
• [Connectivity] This update improves the reliability of Simple Service Discovery Protocol (SSDP) notifications to help prevent the service from becoming unresponsive.

If you want to manually download the security update, head over to the official Microsoft Update Catalog website.