CVE-2026-44807: Microsoft Windows 11 26h1

High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days.

Use after free in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.

Affected products

• Microsoft Windows 11 26h1: before 10.0.28000.2269 (fixed in 10.0.28000.2269)

Published 2026-06-09. Last modified 2026-07-23.