CVE-2026-42829: Microsoft Windows 11 24h2

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

Improper access control in Windows Administrator Protection allows an authorized attacker to bypass a security feature locally.

Affected products

• Microsoft Windows 11 24h2: before 10.0.26100.8655 (fixed in 10.0.26100.8655)
• Microsoft Windows 11 25h2: before 10.0.26200.8655 (fixed in 10.0.26200.8655)
• Microsoft Windows 11 26h1: before 10.0.28000.2269 (fixed in 10.0.28000.2269)

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