CVE-2021-33739 · Severity: critical · CVSS 8.4 · Exploited in the wild · Published 2021-11-03
The Microsoft Desktop Window Manager (DWM) Core Library contains a privilege escalation vulnerability that allows a local attacker to gain elevated system privileges. The vulnerability has been observed being exploited in the wild.
Yes. CVE-2021-33739 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.
How severe is CVE-2021-33739?
Critical severity, with a CVSS score of 8.4, published 3 November 2021.
Which products and versions are affected?
Microsoft Windows 10 1909, 2004, 20H2, 21H1; Microsoft Windows Server 2016 2004, 20H2.
Is there a fix for CVE-2021-33739?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2021-33739 attacked?
It is attacked with local access, in an operating system.
Am I affected by CVE-2021-33739?
Check whether you run Microsoft Windows. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Affected products
Microsoft Windows 10 1909, 2004, 20H2, 21H1
Microsoft Windows Server 2016 2004, 20H2
Timeline
2021-06-08: disclosed: NVD Published Date
2021-11-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog