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

Vulnerability identifier: #VU102644

CSH Severity: Low

CVSS v4.0: 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/E:U/U:Clear

CVE-ID: CVE-2025-21189

CWE-ID: CWE-41

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vendor: Microsoft

Affected software:
Microsoft Internet Explorer
Windows
Windows Server

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.

Install updates from vendor's website.

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