CVE-2026-25170: Microsoft Windows 11 23h2

High severity, CVSS 7.0. EPSS: 0.3% chance of exploitation in the next 30 days.

Use after free in Windows Hyper-V allows an authorized attacker to elevate privileges locally.

Affected products

• Microsoft Windows 11 23h2: before 10.0.22631.6783 (fixed in 10.0.22631.6783)
• Microsoft Windows 11 24h2: before 10.0.26100.7979 (fixed in 10.0.26100.7979)
• Microsoft Windows 11 25h2: before 10.0.26200.7979 (fixed in 10.0.26200.7979)
• Microsoft Windows 11 26h1: before 10.0.28000.1719 (fixed in 10.0.28000.1719)
• Microsoft Windows Server 2022: before 10.0.20348.4830 (fixed in 10.0.20348.4830)
• Microsoft Windows Server 2022 23h2: before 10.0.25398.2207 (fixed in 10.0.25398.2207)
• Microsoft Windows Server 2025: before 10.0.26100.32463 (fixed in 10.0.26100.32463)

Published 2026-03-10. Last modified 2026-06-17.