Desktop Window Manager Elevation of Privilege Vulnerability

Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely CVE-2026-105581 · score 8.8/10

What could go wrong?

Someone who already has a normal account could give themselves full admin rights.

How urgent is it?

Check Microsoft’s page for details.

Who is affected?

Windows 11 Version 26H2 for ARM64-based Systems, Windows 11 Version 26H2 for x64-based Systems, Windows Server 2022, Windows Server 2022 (Server Core installation), Windows Server 2025 (Server Core installation), Windows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, Windows 11 Version 23H2 for ARM64-based Systems and 6 more versions

What should I do?

Install this month’s updates via Windows Update, Intune or your update tool, then restart.

Known problems

Microsoft lists known issues per update: KB5132061, KB5132043, KB5131090, KB5131080, KB5131077, KB5131087. Official page.