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

criticalknown exploitedpublic exploitCVE-2025-30400
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Microsoft Windows DWM Core Library contains a use-after-free vulnerability that allows an authorized attacker to elevate privileges locally.

CSIRTS triage

vendor: Microsoftproduct: Windows DWM Core LibraryPrivilege escalation
What
A use-after-free vulnerability allows an authorized attacker to elevate privileges locally.
Who is affected
Users of Microsoft Windows with the DWM Core Library installed.
Urgency
Immediate remediation is necessary due to active exploitation and critical severity.
Action
Apply the latest security patch from Microsoft to resolve the vulnerability.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2025-05-13
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2025-30400

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2025-30400coverage & exploitation statusNVD · CVE.org

Recent advisories for Microsoft Windows DWM

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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