Remote code execution in Microsoft DWM Core Library

Published: 2021-06-08
Risk Critical
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2021-33739
Exploitation vector Network
Public exploit This vulnerability is being exploited in the wild.
Vulnerable software
Operating systems & Components / Operating system

Windows Server
Operating systems & Components / Operating system

Vendor Microsoft

Security Advisory

This security advisory describes one critical risk vulnerability.

1) Improper Privilege Management

Risk: Critical

CVSSv3.1: 8.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C] [PCI]

CVE-ID: CVE-2021-33739

CWE-ID: CWE-269 - Improper Privilege Management

Exploit availability: Yes


The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to improper privilege management within the Microsoft DWM Core Library. A remote attacker can trick the victim to run a specially crafted executable or script and execute arbitrary code on the system.


Install updates from vendor's website.

Vulnerable software versions

Windows: 10 20H2, 10 21H1, 10 1909, 10 2004

Windows Server: 2019 20H2, 2019 2004

CPE External links

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.