Improper Authorization in Microsoft Windows and Windows Server - CVE-2025-21275

Vulnerability identifier: #VU102757

CSH Severity: Low

CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-21275

CWE-ID: CWE-285

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to bypass authorization checks.

The vulnerability exists due to insufficient authorization controls in Windows App Package Installer. A local user can gain elevated privileges on the target system.

Microsoft Windows
Windows Server

Install updates from vendor's website.

Microsoft Windows - addressed in versions 10 21H2 10.0.19044.5371, 10 22H2 10.0.19045.5371, 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

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-21275

• Improper Authorization in Microsoft Windows App Package Installer