Microsoft warns of a critical remote code execution vulnerability affecting Windows Server versions, requiring immediate patching.
Microsoft has disclosed a critical security vulnerability in multiple Windows Server versions enabling remote attackers to execute arbitrary code. Tracked as CVE-2026-20826, this flaw carries a CVSS v3.1 severity score of 9.8 out of 10. Unauthenticated attackers can exploit this vulnerability over networks without user interaction.
Affected systems include Windows Server 2019 and Windows Server 2022. Successful exploitation grants attackers SYSTEM-level privileges, allowing complete system compromise. Microsoft confirmed active exploitation attempts in limited attacks prior to patch release.
Apply emergency security updates immediately through Windows Update or the Microsoft Update Catalog. Organizations should prioritize patching internet-facing servers. Verify installation of KB5036892 (Server 2019) or KB5036893 (Server 2022).
Microsoft's advisory confirms no viable workarounds exist besides patching. Security teams should monitor authentication logs for unexpected SYSTEM privilege escalations. The vulnerability was privately reported to Microsoft on March 15, 2024, with patches released April 9, 2024.
Review full technical details in Microsoft's Security Update Guide.
Comments
Please log in or register to join the discussion