Microsoft has released the KB5087544 extended security update for Windows 10 Enterprise LTSC users and those enrolled in the Extended Security Update program, addressing May 2026 Patch Tuesday vulnerabilities. The update brings Windows 10 to build 19045.7291 and Windows 10 Enterprise LTSC 2021 to build 19044.7291, fixing 120 security vulnerabilities. A notable fix resolves an issue where Remote Desktop Connection security warning dialogs rendered incorrectly in multi-monitor configurations with different display scaling settings after the April security update.
The update enables dynamic status reporting for Secure Boot states within the Windows Security App and includes additional device targeting data to increase coverage for receiving new Secure Boot certificates through a controlled, phased rollout. A daylight savings time change for the Arab Republic of Egypt supporting the government's 2023 DST order is also included. Microsoft warns of a known issue where Windows prompts users to enter BitLocker recovery keys after installing recent updates.
This problem affects systems using a specific BitLocker Group Policy configuration involving PCR7 in the TPM validation profile along with newer Windows UEFI CA 2023 certificate conditions. As a temporary workaround, Microsoft recommends removing the affected Group Policy setting and suspending and resuming BitLocker to regenerate default PCR bindings while working on a permanent fix. No new features are being released for Windows 10 as Microsoft focuses exclusively on security updates and bug fixes.
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