CVE-2025-62217: 
vulnerability analysis and mitigation

A race condition vulnerability (CVE-2025-62217) was discovered in the Windows Ancillary Function Driver for WinSock that allows an authorized attacker to elevate privileges locally. The vulnerability was disclosed on November 11, 2025, affecting multiple versions of Microsoft Windows operating systems, including Windows Server 2008 through Windows Server 2025, and Windows 10 through Windows 11 (NVD).

The vulnerability is classified as a concurrent execution issue using shared resource with improper synchronization (CWE-362). Microsoft has assigned it a CVSS v3.1 base score of 7.0 (HIGH) with the vector string CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H, indicating local access required, high attack complexity, low privileges required, and high impact on confidentiality, integrity, and availability (NVD).

If successfully exploited, this vulnerability allows an authorized attacker with low privileges to elevate their privileges on the affected system. This could potentially lead to complete system compromise, affecting the confidentiality, integrity, and availability of the system (Rapid7).

Microsoft has released security updates to address this vulnerability across all affected versions of Windows. Users are advised to apply the relevant security updates through Windows Update or by downloading and installing the appropriate patches for their specific Windows version (Rapid7).