Is CVE-2025-21247 in the CISA KEV catalog?

No. CVE-2025-21247 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-21247?

CVE-2025-21247 has a CVSS v3 base score of 4.3 (MEDIUM).

What is the EPSS score for CVE-2025-21247?

CVE-2025-21247 has an EPSS score of 2.98% (86th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-21247?

Install KB5053618 for Windows 10. Fixes are available for 23 affected products.

CVE & CISA-KEV Catalog

CVE-2025-21247

MEDIUMEPSS 86th pctl

4.3

CVSS v3

NVD

Description

Improper resolution of path equivalence in Windows MapUrlToZone allows an unauthorized attacker to bypass a security feature over a network.

CWE-41

How to fix

Remediation Available

Windows 10Windows

Install:KB5053618Microsoft

Windows 10 Version 1607Windows

Install:KB5053594Microsoft

Windows 10 Version 1809Windows

Install:KB5053596Microsoft

Windows 10 Version 21H2Windows

Install:KB5053606Microsoft

Windows 10 Version 22H2Windows

Install:KB5053606Microsoft

Windows 11 Version 22H2Windows

Install:KB5053602Microsoft

Windows 11 Version 23H2Windows

Install:KB5053602Microsoft

Windows 11 Version 24H2Windows

Install:KB5053636

Install:KB5053598Microsoft

Windows Server 2008Windows

Install:KB5053593Microsoft

Install:KB5053888Microsoft

Install:KB5053995Microsoft

Windows Server 2008 R2Windows

Install:KB5053627Microsoft

Install:KB5053620Microsoft

Install:KB5053593Microsoft

Windows Server 2012Windows

Install:KB5053886Microsoft

Windows Server 2012 (Server Core installation)Windows

Install:KB5053886Microsoft

Windows Server 2012 R2Windows

Install:KB5053593Microsoft

Install:KB5053887Microsoft

Windows Server 2012 R2 (Server Core installation)Windows

Install:KB5053593Microsoft

Install:KB5053887Microsoft

Windows Server 2016Windows

Install:KB5053594Microsoft

Windows Server 2016 (Server Core installation)Windows

Install:KB5053594Microsoft

Windows Server 2019Windows

Install:KB5053596Microsoft

Windows Server 2019 (Server Core installation)Windows

Install:KB5053596Microsoft

Windows Server 2022Windows

Install:KB5053603Microsoft

Install:KB5053638

Windows Server 2022 (Server Core installation)Windows

Install:KB5053603Microsoft

Install:KB5053638

Windows Server 2022, 23H2 Edition (Server Core installation)Windows

Install:KB5053599Microsoft

Windows Server 2025Windows

Install:KB5053636

Install:KB5053598Microsoft

Windows Server 2025 (Server Core installation)Windows

Install:KB5053636

Install:KB5053598Microsoft

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Exploit Intelligence

2.98%probability of exploitation in 30 days

86thpercentile

Elevated risk: more likely to be exploited than 86% of all known CVEs.

References

Vendor Advisory1

msrc.microsoft.com

Embed a live status badge for CVE-2025-21247

Markdown

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HTML

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-07-03.