CVE-2021-41357

Win32k Elevation of Privilege Vulnerability

CVE-2021-41357 is fixed in 14 products on 1 platform, first by KB5006670, released October 12, 2021. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on April 25, 2022. Patch Radar priority: Patch now.

Patch nowCISA KEV

CVSS

7.8

Important

Exploitation

Exploited

Listed by CISA

CISA KEV

Apr 25, 2022

Federal due date May 16, 2022

EPSS

0.0158

75th percentile

Where it's fixed

Product	Fixed in	Fix	Released
Microsoft
Windows 10 Version 2004 for 32-bit Systems		KB5006670	Oct 12, 2021
Windows 10 Version 2004 for ARM64-based Systems		KB5006670	Oct 12, 2021
Windows 10 Version 2004 for x64-based Systems		KB5006670	Oct 12, 2021
Windows 10 Version 20H2 for 32-bit Systems		KB5006670	Oct 12, 2021
Windows 10 Version 20H2 for ARM64-based Systems		KB5006670	Oct 12, 2021
Windows 10 Version 21H1 for 32-bit Systems		KB5006670	Oct 12, 2021
Windows 10 Version 21H1 for ARM64-based Systems		KB5006670	Oct 12, 2021
Windows 10 Version 21H1 for x64-based Systems		KB5006670	Oct 12, 2021
Windows 11 version 21H2 for ARM64-based Systems	22000.258	KB5006674	Oct 12, 2021
Windows 11 version 21H2 for x64-based Systems	22000.258	KB5006674	Oct 12, 2021
Windows Server 2022	20348.288	KB5006699	Oct 12, 2021
Windows Server 2022 (Server Core installation)	20348.288	KB5006699	Oct 12, 2021
Windows Server, version 2004 (Server Core installation)		KB5006670	Oct 12, 2021
Windows Server, version 20H2 (Server Core Installation)		KB5006670	Oct 12, 2021

Details

Published
October 12, 2021
CISA required action
Apply updates per vendor instructions.
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-41357

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