CVE-2025-30400: 
vulnerability analysis and mitigation

A use-after-free vulnerability in Windows Desktop Windows Manager (DWM) Core library was discovered and tracked as CVE-2025-30400. The vulnerability was disclosed on May 13, 2025, affecting various versions of Microsoft Windows operating systems. This security flaw allows an authorized attacker to elevate privileges locally (NVD, CISA).

The vulnerability has been assigned a CVSSv3 score of 7.8 (HIGH) with the following vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. The flaw exists in the Windows DWM Core library and is classified as a use-after-free vulnerability (CWE-416). This is the seventh EoP vulnerability in DWM Core Library patched in 2025 (Tenable).

Successful exploitation of this vulnerability allows an authorized attacker to elevate their privileges to administrator level on affected systems. This could potentially give attackers increased control over compromised systems and enable them to perform unauthorized actions with elevated permissions (NVD).

Microsoft has released security updates to address this vulnerability as part of their May 2025 Patch Tuesday release. CISA has established a due date of June 03, 2025, for Federal Civilian Executive Branch (FCEB) agencies to apply the vendor patches. Organizations are strongly urged to prioritize timely remediation of this vulnerability as part of their vulnerability management practice (CISA).