CVE-2025-53142: 
vulnerability analysis and mitigation

CVE-2025-53142 is a use-after-free vulnerability discovered in the Microsoft Brokering File System. The vulnerability was initially disclosed on August 12, 2025, and was last modified in the National Vulnerability Database (NVD) on August 18, 2025. This security flaw affects multiple versions of Windows 11 and Windows Server, including Windows 11 22H2, 23H2, 24H2, Windows Server 2022 23H2, and Windows Server 2025 (NVD).

The vulnerability is classified as CWE-416 (Use After Free) and has been assigned a CVSS v3.1 base score of 7.0 (HIGH). The CVSS vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H, indicating that the vulnerability requires local access, has high attack complexity, requires low privileges, needs no user interaction, and can potentially impact confidentiality, integrity, and availability at high levels (NVD).

The vulnerability allows an authorized attacker to elevate privileges locally on affected systems. This means that a successful exploit could enable an attacker with limited access to gain higher-level privileges on the compromised system (NVD).

Microsoft has identified the affected software versions and is tracking this vulnerability. The affected versions include Windows 11 up to version 10.0.26100.4851 (24H2), Windows Server 2025 up to version 10.0.26100.4851, Windows 11 up to version 10.0.22621.5768 (22H2), Windows 11 up to version 10.0.22631.5768 (23H2), and Windows Server 2022 23H2 up to version 10.0.25398.1791 (NVD).