Microsoft’s Windows 10 KB5087544 Extended Security Update is a reminder that Windows 10 has now moved into a security-maintenance phase, not a feature-development phase. For organizations still running Windows 10 Enterprise LTSC or systems enrolled in the ESU program, these updates remain critical because the May 2026 Patch Tuesday fixes 120 vulnerabilities and also resolves issues around Remote Desktop security warnings.

Enterprises should not treat ESU as a long-term comfort blanket. It is a temporary risk-management bridge while migration, application compatibility testing, and hardware refresh planning are completed. Security teams should prioritize timely patching, validate BitLocker recovery readiness before rollout, and test updates on systems using Secure Boot or TPM-related policies. Because naturally, the one system you forget to test is always the one that asks for a BitLocker recovery key on Monday morning.

Microsoft has released the Windows 10 KB5087544 extended security update to fix the May 2026 Patch Tuesday vulnerabilities and resolve an issue with the new Remote Desktop warnings. [...]

Source: Microsoft releases Windows 10 KB5087544 extended security update via Bleeping Computer — published 12 May 2026.