CVE-2025-53805: Microsoft Windows 11 22h2

High severity, CVSS 7.5. EPSS: 1.4% chance of exploitation in the next 30 days.

Out-of-bounds read in Windows Internet Information Services allows an unauthorized attacker to deny service over a network.

Affected products

• Microsoft Windows 11 22h2: before 10.0.22621.5909 (fixed in 10.0.22621.5909)
• Microsoft Windows 11 23h2: before 10.0.22631.5909 (fixed in 10.0.22631.5909)
• Microsoft Windows 11 24h2: before 10.0.26100.6508 (fixed in 10.0.26100.6508)
• Microsoft Windows Server 2022: before 10.0.20348.4106 (fixed in 10.0.20348.4106)
• Microsoft Windows Server 2022 23h2: before 10.0.25398.1849 (fixed in 10.0.25398.1849)
• Microsoft Windows Server 2025: before 10.0.26100.6508 (fixed in 10.0.26100.6508)

Published 2025-09-09. Last modified 2026-06-17.