CVE-2025-50170: 
vulnerability analysis and mitigation

A security vulnerability identified as CVE-2025-50170 was discovered in the Windows Cloud Files Mini Filter Driver. The vulnerability was disclosed on August 12, 2025, affecting multiple versions of Microsoft Windows operating systems. The issue stems from improper handling of insufficient permissions or privileges, which could potentially be exploited by an authorized attacker (NVD).

The vulnerability has been assigned a CVSS v3.1 base score of 7.8 (High), with a vector string of CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. The technical assessment indicates local access is required (AV:L), with low attack complexity (AC:L), low privileges required (PR:L), and no user interaction needed (UI:N). The scope is unchanged (S:U), with high impacts on confidentiality, integrity, and availability (C:H/I:H/A:H). The vulnerability is classified under CWE-280 (Improper Handling of Insufficient Permissions or Privileges) (NVD).

The vulnerability affects multiple Windows versions including Windows 11 24H2, Windows Server 2025, Windows 10 (versions 1809, 21H2, 22H2), Windows 11 (versions 22H2, 23H2), Windows Server 2019, Windows Server 2022, and Windows Server 2022 23H2. If successfully exploited, this vulnerability allows an authorized attacker to elevate privileges locally on the affected system (NVD).

Microsoft has released security updates to address this vulnerability. The fixes are available for all affected versions of Windows, with specific version numbers provided: Windows 11 24H2 (up to 10.0.26100.4851), Windows Server 2025 (up to 10.0.26100.4851), Windows 10 1809 (up to 10.0.17763.7678), Windows 10 21H2/22H2 (up to 10.0.19044.6216/10.0.19045.6216), Windows 11 22H2/23H2 (up to 10.0.22621.5768/10.0.22631.5768), Windows Server 2019 (up to 10.0.17763.7678), and Windows Server 2022 (up to 10.0.20348.3989) (NVD).