CVE-2026-47652: Microsoft Windows 11 23h2

High severity, CVSS 8.2. EPSS: 0.3% chance of exploitation in the next 30 days.

Heap-based buffer overflow in Windows Hyper-V allows an authorized attacker to execute code locally.

Affected products

• Microsoft Windows 11 23h2: before 10.0.22631.7219 (fixed in 10.0.22631.7219)
• 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)
• Microsoft Windows Server 2022: before 10.0.20348.5256 (fixed in 10.0.20348.5256)
• Microsoft Windows Server 2025: before 10.0.26100.32995 (fixed in 10.0.26100.32995)

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