Microsoft Releases Windows 10 KB5087544 Extended Security Update
Summary
Microsoft's Windows 10 KB5087544 update addresses May 2026 security vulnerabilities, fixes a Remote Desktop warning display issue, and improves Secure Boot reporting. Microsoft also warns of a BitLocker recovery-key prompt issue and offers a temporary workaround.
Key points
- KB5087544 is available to Windows 10 ESU and Enterprise LTSC users; the article says it updates systems to builds 19045.7291 and 19044.7291, respectively.
- Microsoft says its May 2026 Patch Tuesday updates fixed 120 vulnerabilities.
- The update fixes Remote Desktop security warning dialogs rendering incorrectly on multi-monitor setups with different display scaling.
- Secure Boot status reporting and device targeting for automatic certificate updates are improved, with certificate deployment phased according to successful update signals.
- Microsoft warns that some systems may prompt for a BitLocker recovery key after recent updates when specific Group Policy, PCR7, and Secure Boot conditions apply.
- As a temporary workaround, Microsoft advises removing the affected Group Policy setting, then suspending and resuming BitLocker while it develops a permanent fix.
Article Details
- Event Type
- Microsoft released the Windows 10 KB5087544 extended security update for ESU and LTSC users.
- Impact
- The update addresses the May 2026 Patch Tuesday vulnerabilities, including 120 vulnerabilities reported as fixed, and corrects a Remote Desktop security warning display issue on multi-monitor setups. It also improves Secure Boot status reporting and certificate targeting. Microsoft warns that some systems with a specific BitLocker Group Policy and Secure Boot configuration may prompt users for a recovery key after recent updates; the article says Microsoft is working on a permanent fix and provides a temporary workaround.
Vendors
Products
BitLockerThe update also includes Secure Boot improvements, a daylight saving time change for Egypt, and a note about a BitLocker recovery key prompt affecting some systems.Remote DesktopMicrosoft has released Windows 10 KB5087544 to address May 2026 Patch Tuesday vulnerabilities and fix a Remote Desktop warning display issue.Secure BootThe update also includes Secure Boot improvements, a daylight saving time change for Egypt, and a note about a BitLocker recovery key prompt affecting some systems.Windows 10Microsoft has released Windows 10 KB5087544 to address May 2026 Patch Tuesday vulnerabilities and fix a Remote Desktop warning display issue.