Microsoft Desktop Window Manager (DWM) Core Library Privilege Escalation Vulnerability

HIGH 8.4EXPLOITED (CISA KEV)CVE-2021-33739 · Published 08/06/2021 · updated 17/06/2026

Microsoft Desktop Window Manager (DWM) Core Library Privilege Escalation Vulnerability. Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 03/11/2021. Patch affected systems as an emergency.

Package	Affected versions	Patched versions
Windows Microsoft	Versions not published yet (product named by CISA KEV)

Description

Microsoft DWM Core Library Elevation of Privilege Vulnerability

References

portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-33739 · Patch
cisa.gov/known-exploited-vulnerabilities-catalog · US Government Resource
CISA KEV · CVE-2021-33739

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