Windows Advanced Rasterization Platform Elevation of Privilege Vulnerability

Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely CVE-2026-118228 · 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 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, Windows Server 2019, Windows Server 2019 (Server Core installation), Windows 10 Version 21H2 for 32-bit 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: KB5126646, KB5127646, KB5126651, KB5126657, KB5126655, KB5126653. Official page.