Windows Advanced Rasterization Platform Elevation of Privilege Vulnerability

Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely CVE-2026-105498 · 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 2025, Windows Server 2025 (Server Core installation), Windows 11 Version 26H1 for ARM64-based Systems, Windows 11 version 26H1 for x64-based Systems, Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems and 16 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: KB5127648, KB5126646, KB5127646, KB5126651, KB5126657, KB5126655. Official page.