Improper access control in Microsoft Windows and Windows Server - CVE-2025-21337

Vulnerability identifier: #VU103819

CSH Severity: Low

CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-21337

CWE-ID: CWE-284

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions in Windows NTFS. A local user can bypass implemented security restrictions and gain unauthorized access to sensitive information.

Microsoft Windows
Windows Server

Install updates from vendor's website.

Microsoft Windows - addressed in versions 10 21H2 10.0.19044.5487, 10 22H2 10.0.19045.5487, 10 1507 10.0.10240.20915, 10 1607 10.0.14393.7785, 10 1809 10.0.17763.6893, 11 22H2 10.0.22621.4890, 11 23H2 10.0.22631.4890, 11 24H2 10.0.26100.3107, 11 24H2 10.0.26100.3194
Windows Server - addressed in versions 2008 R2 6.1.7601.27566, 2008 6.0.6003.23117, 2012 R2 6.3.9600.22417, 2012 6.2.9200.25317, 2016 10.0.14393.7785, 2022 23H2 10.0.25398.1425, 2022 10.0.20348.3148, 2022 10.0.20348.3207

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21337

• Improper access control in Microsoft Windows NTFS