Security Feature Bypass in Windows MapUrlToZone by Microsoft
CVE-2025-21247

4.3MEDIUM

Key Information:

Vendor
Microsoft
Status
Windows Server 2025
Windows Server 2025 (server Core Installation)
Windows 10 Version 1809
Windows Server 2019
Vendor
CVE Published:
11 March 2025

Summary

The Windows MapUrlToZone component suffers from an improper resolution of path equivalence, allowing jeopardy for network security. Attackers can exploit this flaw to bypass essential security measures seamlessly.

Affected Version(s)

Windows 10 Version 1507 32-bit Systems 10.0.10240.0 < 10.0.10240.20947

Windows 10 Version 1607 32-bit Systems 10.0.14393.0 < 10.0.14393.7876

Windows 10 Version 1809 32-bit Systems 10.0.17763.0 < 10.0.17763.7009

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisory

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.