CVE-2025-30400: Microsoft Windows DWM Core Library Use-After-Free Vulnerability

CVE-2025-30400 · Severity: critical · CVSS 7.8 · Exploited in the wild · Published 2025-05-13

A use-after-free vulnerability in the Microsoft Windows Desktop Window Manager (DWM) Core Library allows a locally authenticated attacker to elevate their privileges. The vulnerability has been observed being exploited in the wild.

Technologies: Microsoft Windows. Vendors: Microsoft.

Quick answers

Is CVE-2025-30400 exploited in the wild?
Yes. CVE-2025-30400 is known to be exploited in the wild, first recorded on 13 May 2025. Treat it as urgent.
How severe is CVE-2025-30400?
Critical severity, with a CVSS score of 7.8, published 13 May 2025.
Which products and versions are affected?
Microsoft Windows 10 1809 up to (excluding) 10.0.17763.7314; Microsoft Windows 10 21H2 up to (excluding) 10.0.19044.5854; Microsoft Windows 10 22H2 up to (excluding) 10.0.19045.5854; Microsoft Windows 11 22H2 up to (excluding) 10.0.22621.5335; and 6 more.
Is there a fix for CVE-2025-30400?
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-2025-30400 attacked?
It is attacked with local access, in an operating system.
Am I affected by CVE-2025-30400?
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 1809 up to (excluding) 10.0.17763.7314
  • Microsoft Windows 10 21H2 up to (excluding) 10.0.19044.5854
  • Microsoft Windows 10 22H2 up to (excluding) 10.0.19045.5854
  • Microsoft Windows 11 22H2 up to (excluding) 10.0.22621.5335
  • Microsoft Windows 11 23H2 up to (excluding) 10.0.22631.5335
  • Microsoft Windows 11 24H2 up to (excluding) 10.0.26100.4061
  • Microsoft Windows Server 2019 up to (excluding) 10.0.17763.7314
  • Microsoft Windows Server 2022 up to (excluding) 10.0.20348.3692
  • Microsoft Windows Server 2022 23H2 up to (excluding) 10.0.25398.1611
  • Microsoft Windows Server 2025 up to (excluding) 10.0.26100.4061

Timeline

  • 2025-05-13: disclosed
  • 2025-05-13: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
  • 2025-05-13: advisory: Microsoft published vendor advisory
  • 2025-05-13: exploited: Reported as exploited in the wild at time of publication

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.