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CVE-2022-21882: Win32k Elevation of Privilege Vulnerability

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2022-02-04
• EPSS: 59.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-01-11 · updated 2026-08-15
• Weakness: CWE-787

Description

Win32k Elevation of Privilege Vulnerability

Affected products

• Microsoft Windows 10: before 10.0.17763.2452 — fixed in 10.0.17763.2452
• Microsoft Windows 10 1909: before 10.0.18363.2037 — fixed in 10.0.18363.2037
• Microsoft Windows 10 20H2: before 10.0.19042.1466 — fixed in 10.0.19042.1466
• Microsoft Windows 10 21H1: before 10.0.19043.1466 — fixed in 10.0.19043.1466
• Microsoft Windows 10: before 10.0.19044.1466 — fixed in 10.0.19044.1466
• Microsoft Windows 11 21H2: before 10.0.22000.434 — fixed in 10.0.22000.434
• Microsoft Windows Server 2019: before 10.0.17763.2452 — fixed in 10.0.17763.2452
• Microsoft Windows Server 2022: before 10.0.20348.469 — fixed in 10.0.20348.469
• Microsoft Windows Server 20H2: before 10.0.19042.1466 — fixed in 10.0.19042.1466
• Microsoft Windows 10: from 10.0.17763.0 before 10.0.17763.2452 — fixed in 10.0.17763.2452
• Microsoft Windows 10 1909: from 10.0.0 before 10.0.18363.2037 — fixed in 10.0.18363.2037
• Microsoft Windows 10 20H2: from 10.0.0 before 10.0.19042.1466 — fixed in 10.0.19042.1466
• Microsoft Windows 10 21H1: from 10.0.0 before 10.0.19043.1466 — fixed in 10.0.19043.1466
• Microsoft Windows 10: from 10.0.19043.0 before 10.0.19044.1466 — fixed in 10.0.19044.1466
• Microsoft Windows 11 21H2: from 10.0.0 before 10.0.22000.434 — fixed in 10.0.22000.434
• Microsoft Windows Server 2019: from 10.0.17763.0 before 10.0.17763.2452 — fixed in 10.0.17763.2452
• Microsoft Windows Server 2022: from 10.0.20348.0 before 10.0.20348.469 — fixed in 10.0.20348.469
• Microsoft Windows Server version 20H2: from 10.0.0 before 10.0.19042.1466 — fixed in 10.0.19042.1466

How to fix

Upgrade to a fixed version: Microsoft Windows 10 10.0.17763.2452; Microsoft Windows 10 1909 10.0.18363.2037; Microsoft Windows 10 20H2 10.0.19042.1466; Microsoft Windows 10 21H1 10.0.19043.1466; Microsoft Windows 10 10.0.19044.1466; Microsoft Windows 11 21H2 10.0.22000.434; Microsoft Windows Server 2019 10.0.17763.2452; Microsoft Windows Server 2022 10.0.20348.469; Microsoft Windows Server 20H2 10.0.19042.1466; Microsoft Windows 10 10.0.17763.2452; Microsoft Windows 10 1909 10.0.18363.2037; Microsoft Windows 10 20H2 10.0.19042.1466. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-21882
• http://packetstormsecurity.com/files/166169/Win32k-ConsoleControl-Offset-Confusion-Privilege-Escalation.html
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-21882
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-21882

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