MEDIUM 4.3 Microsoft

CVE-2025-21247

MapUrlToZone Security Feature Bypass Vulnerability

Microsoft Security Update 2025-Mar: MapUrlToZone Security Feature Bypass Vulnerability

Affected Products

Windows Server 2025
Windows Server 2025 (Server Core installation)
Windows 10 Version 1809 for 32-bit Systems
Windows 10 Version 1809 for x64-based Systems
Windows Server 2019
Windows Server 2019 (Server Core installation)
Windows Server 2022
Windows Server 2022 (Server Core installation)

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21247
https://nvd.nist.gov/vuln/detail/CVE-2025-21247

Published: 2025-03-11 · Source: Microsoft · Feed updated: 2026-08-10

This medium severity vulnerability with a CVSS score of 4.3 was published on 2025-03-11 via Microsoft. Affected: Windows Server 2025, Windows Server 2025 (Server Core installation), Windows 10 Version 1809 for 32-bit Systems and 5 more.

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