CVE-2022-22047: Microsoft Windows Client Server Runtime Subsystem (CSRSS) Privilege Escalation Vulnerability

High severity, CVSS 7.8. Actively exploited: in CISA KEV since 2022-07-12. EPSS: 18.8% chance of exploitation in the next 30 days.

Windows Client Server Run-time Subsystem (CSRSS) Elevation of Privilege Vulnerability

Affected products

• Microsoft Windows 10 1507: before 10.0.10240.19360 (fixed in 10.0.10240.19360)
• Microsoft Windows 10 1607: before 10.0.14393.5246 (fixed in 10.0.14393.5246)
• Microsoft Windows 10 1809: before 10.0.17763.3165 (fixed in 10.0.17763.3165)
• Microsoft Windows 10 20h2: before 10.0.19042.1826 (fixed in 10.0.19042.1826)
• Microsoft Windows 10 21h1: before 10.0.19043.1826 (fixed in 10.0.19043.1826)
• Microsoft Windows 10 21h2: before 10.0.19044.1826 (fixed in 10.0.19044.1826)
• Microsoft Windows 11 21h2: before 10.0.22000.795 (fixed in 10.0.22000.795)
• Microsoft Windows 7: affected versions not specified
• Microsoft Windows 8.1: affected versions not specified
• Microsoft Windows Rt 8.1: affected versions not specified
• Microsoft Windows Server 2008: affected versions not specified; version r2 only
• Microsoft Windows Server 2012: affected versions not specified; version r2 only
• Microsoft Windows Server 2016: before 10.0.14393.5246 (fixed in 10.0.14393.5246)
• Microsoft Windows Server 2019: before 10.0.17763.3165 (fixed in 10.0.17763.3165)
• Microsoft Windows Server 2022: before 10.0.20348.825 (fixed in 10.0.20348.825)
• Microsoft Windows Server 20h2: before 10.0.19042.1826 (fixed in 10.0.19042.1826)

Published 2022-07-12. Last modified 2026-06-17.