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

Source: https://junglewise.ai/threats/cve-2025-30400-microsoft-windows-dwm-core-library-use-after-free-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-05-13. Updated: 2026-05-09  
License: CC BY 4.0 with a link back

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](https://junglewise.ai/threats/technologies/windows). Vendors: [Microsoft](https://junglewise.ai/threats/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

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