Improper access control in Microsoft Windows and Windows Server - CVE-2025-21340
Published: January 14, 2025
Vulnerability identifier: #VU102742
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-21340
CWE-ID: CWE-284
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to improper access restrictions in Windows Virtualization-Based Security (VBS). A local user can bypass implemented security restrictions and gain unauthorized access to sensitive information on the system.
Affected software
Microsoft Windows
Windows Server
Windows Server
How to mitigate CVE-2025-21340
Install updates from vendor's website.
Microsoft Windows - addressed in versions 10 21H2 10.0.19044.5371, 10 22H2 10.0.19045.5371, 10 1809 10.0.17763.6775, 11 22H2 10.0.22621.4751, 11 23H2 10.0.22631.4751, 11 24H2 10.0.26100.3107
Windows Server - addressed in versions 2016 10.0.14393.7785, 2022 23H2 10.0.25398.1369, 2022 10.0.20348.3091, 2025 10.0.26100.2894
Windows Server - addressed in versions 2016 10.0.14393.7785, 2022 23H2 10.0.25398.1369, 2022 10.0.20348.3091, 2025 10.0.26100.2894