Improper Resolution of Path Equivalence in Microsoft products - CVE-2025-21189

Vulnerability identifier: #VU102644

CSH Severity: Low

CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-21189

CWE-ID: CWE-41

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to improper resolution of path equivalence in MapUrlToZone security feature. A remote attacker can trick the victim into opening a specially crafted file and gain access to sensitive information.

Microsoft Windows
Windows Server
Microsoft Internet Explorer

Install updates from vendor's website.

Microsoft Windows - addressed in versions 10 21H2 10.0.19044.5371, 10 22H2 10.0.19045.5371, 10 1507 10.0.10240.20890, 10 1607 10.0.14393.7699, 10 1809 10.0.17763.6775, 11 22H2 10.0.22621.4751, 11 23H2 10.0.22631.4751, 11 24H2 10.0.26100.2894, 11 24H2 10.0.26100.3107
Windows Server - addressed in versions 2008 R2 6.1.7601.27520, 2008 6.0.6003.23070, 2012 R2 6.3.9600.22371, 2012 6.2.9200.25273, 2016 10.0.14393.7785, 2022 23H2 10.0.25398.1369, 2022 10.0.20348.3091

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-21189

• Multiple vulnerabilities in Microsoft Internet Explorer MapUrlToZone security feature