CVE-2021-33739

Microsoft DWM Core Library Elevation of Privilege Vulnerability

CVE-2021-33739 is fixed in 13 products on 1 platform, first by KB5003635, released June 8, 2021. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on November 3, 2021. Patch Radar priority: Patch now.

Patch nowCISA KEVPublicly disclosed

CVSS

8.4

Important

Exploitation

Exploited

Reported by the vendor

CISA KEV

Nov 3, 2021

Federal due date Nov 17, 2021

EPSS

0.0661

93rd percentile

Where it's fixed

Product	Fixed in	Fix	Released
Microsoft
Windows 10 Version 1909 for 32-bit Systems	18363.1621	KB5003635	Jun 8, 2021
Windows 10 Version 1909 for ARM64-based Systems	18363.1621	KB5003635	Jun 8, 2021
Windows 10 Version 1909 for x64-based Systems	18363.1621	KB5003635	Jun 8, 2021
Windows 10 Version 2004 for 32-bit Systems		KB5003637	Jun 8, 2021
Windows 10 Version 2004 for ARM64-based Systems		KB5003637	Jun 8, 2021
Windows 10 Version 2004 for x64-based Systems		KB5003637	Jun 8, 2021
Windows 10 Version 20H2 for 32-bit Systems		KB5003637	Jun 8, 2021
Windows 10 Version 20H2 for ARM64-based Systems		KB5003637	Jun 8, 2021
Windows 10 Version 21H1 for 32-bit Systems		KB5003637	Jun 8, 2021
Windows 10 Version 21H1 for ARM64-based Systems		KB5003637	Jun 8, 2021
Windows 10 Version 21H1 for x64-based Systems		KB5003637	Jun 8, 2021
Windows Server, version 2004 (Server Core installation)		KB5003637	Jun 8, 2021
Windows Server, version 20H2 (Server Core Installation)		KB5003637	Jun 8, 2021

Details

Published
June 8, 2021
CISA required action
Apply updates per vendor instructions.
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-33739

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