Cybersecuritynews Microsoft Patches Zero-Day Vulnerability in Remote Desktop Services
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Microsoft has addressed CVE-2026-21533, a zero-day elevation of privilege vulnerability in Windows Remote Desktop Services, which is being actively exploited by attackers to gain SYSTEM-level access. The flaw, resulting from improper privilege management, was patched in the February 2026 Patch Tuesday updates released on February 10, 2026. A public proof of concept (PoC) for this vulnerability was made available on February 11, 2026.
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Timeline
2026-02-10
CVE-2026-21533 published and patched
2026-02-10
CVE-2026-21533 added to CISA KEV (active exploitation)
2026-02-11
First public PoC for CVE-2026-21533 released
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