CVE-2024-21447: Microsoft Windows 10 21h2

High severity, CVSS 7.8. EPSS: 1.4% chance of exploitation in the next 30 days.

Windows Authentication Elevation of Privilege Vulnerability

Affected products

• Microsoft Windows 10 21h2: before 10.0.19044.4291 (fixed in 10.0.19044.4291)
• Microsoft Windows 10 22h2: before 10.0.19045.4291 (fixed in 10.0.19045.4291)
• Microsoft Windows 11 21h2: before 10.0.22000.2899 (fixed in 10.0.22000.2899)
• Microsoft Windows 11 22h2: before 10.0.22621.3447 (fixed in 10.0.22621.3447)
• Microsoft Windows 11 23h2: before 10.0.22631.3447 (fixed in 10.0.22631.3447)
• Microsoft Windows Server 2022: before 10.0.20348.2402 (fixed in 10.0.20348.2402)
• Microsoft Windows Server 2022 23h2: before 10.0.25398.830 (fixed in 10.0.25398.830)

Published 2024-04-09. Last modified 2026-06-17.