CVE-2022-21882

Win32k Elevation of Privilege Vulnerability

CVE-2022-21882 is fixed in 21 products on 1 platform, first by KB5009557, released January 11, 2022. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on February 4, 2022, with known ransomware use. Patch Radar priority: Patch now.

Patch nowCISA KEVKnown ransomware use

CVSS

7.0

Important

Exploitation

Exploited

Reported by the vendor

CISA KEV

Feb 4, 2022

Federal due date Feb 18, 2022. Known ransomware use

EPSS

0.5921

99th percentile

Where it's fixed

Product	Fixed in	Fix	Released
Microsoft
Windows 10 Version 1809 for 32-bit Systems	17763.2452	KB5009557	Jan 11, 2022
Windows 10 Version 1809 for ARM64-based Systems	17763.2452	KB5009557	Jan 11, 2022
Windows 10 Version 1809 for x64-based Systems	17763.2452	KB5009557	Jan 11, 2022
Windows 10 Version 1909 for 32-bit Systems	18363.2037	KB5009545	Jan 11, 2022
Windows 10 Version 1909 for ARM64-based Systems	18363.2037	KB5009545	Jan 11, 2022
Windows 10 Version 1909 for x64-based Systems	18363.2037	KB5009545	Jan 11, 2022
Windows 10 Version 20H2 for 32-bit Systems		KB5009543	Jan 11, 2022
Windows 10 Version 20H2 for ARM64-based Systems		KB5009543	Jan 11, 2022
Windows 10 Version 21H1 for 32-bit Systems		KB5009543	Jan 11, 2022
Windows 10 Version 21H1 for ARM64-based Systems		KB5009543	Jan 11, 2022
Windows 10 Version 21H1 for x64-based Systems		KB5009543	Jan 11, 2022
Windows 10 Version 21H2 for 32-bit Systems		KB5009543	Jan 11, 2022
Windows 10 Version 21H2 for ARM64-based Systems		KB5009543	Jan 11, 2022
Windows 10 Version 21H2 for x64-based Systems		KB5009543	Jan 11, 2022
Windows 11 version 21H2 for ARM64-based Systems	22000.434	KB5009566	Jan 11, 2022
Windows 11 version 21H2 for x64-based Systems	22000.434	KB5009566	Jan 11, 2022
Windows Server 2019	17763.2452	KB5009557	Jan 11, 2022
Windows Server 2019 (Server Core installation)	17763.2452	KB5009557	Jan 11, 2022
Windows Server 2022	20348.469	KB5009555	Jan 11, 2022
Windows Server 2022 (Server Core installation)	20348.469	KB5009555	Jan 11, 2022
Windows Server, version 20H2 (Server Core Installation)		KB5009543	Jan 11, 2022

Details

Published
January 11, 2022
CISA required action
Apply updates per vendor instructions.
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-21882

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