CVE-2021-33739 Microsoft Desktop Window Manager (DWM) Core Library Privilege Escalation
An attacker can exploit a vulnerability in the Microsoft DWM Core Library to elevate privileges on affected Windows systems.
- Exploited in the wild
- Since 3 Nov 2021
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-33739?
CVE-2021-33739 is a high-severity vulnerability in Microsoft Windows 10 20h2, published on 8 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Microsoft DWM Core Library Elevation of Privilege Vulnerability
Which versions are affected by CVE-2021-33739?
It affects 6 products.
Products include Microsoft Windows 10 1909, Microsoft Windows 10 2004, Microsoft Windows 10 20h2, Microsoft Windows 10 21h1, Microsoft Windows Server 2004, Microsoft Windows Server 20h2.
How do I fix CVE-2021-33739?
No fix has been published for CVE-2021-33739 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 17 Nov 2021.
Is CVE-2021-33739 being exploited?
Yes. Attackers have exploited CVE-2021-33739 in the wild since at least 3 Nov 2021.
Public exploit code: 2 proofs of concept on GitHub.
Sources
Also known as GHSA-4mwq-m8xw-34mr.