CVE-2025-55335: 
vulnerability analysis and mitigation

A use-after-free vulnerability in Windows NTFS (CVE-2025-55335) was disclosed on October 14, 2025. This security flaw affects multiple versions of Microsoft Windows Server and Windows operating systems, including Windows Server 2012 R2, 2016, 2019, 2022, and Windows 10/11 versions (NVD).

The vulnerability is classified as a use-after-free (CWE-416) and race condition (CWE-362) issue in the Windows NTFS component. It received a CVSS v3.1 base score of 7.0 (High) from NIST and 7.4 (High) from Microsoft, with the following vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H, indicating local access vector, high attack complexity, no privileges required, and high impacts on confidentiality, integrity, and availability (NVD).

If successfully exploited, this vulnerability allows an unauthorized attacker to elevate privileges locally on affected systems. This could potentially give attackers system-level access, enabling them to execute arbitrary code, access sensitive information, or perform unauthorized actions with elevated privileges (NVD).

Microsoft has released security updates to address this vulnerability across all affected Windows versions. System administrators are advised to apply the relevant security patches through Windows Update or manual installation of the security updates (ASEC).