# CVE-2025-21391

Windows Storage Elevation of Privilege Vulnerability

- Page: https://www.vulneraibility.com/cve/CVE-2025-21391
- CVSS: 7.1
- Known exploited: yes, in CISA KEV since 2025-02-11; CISA due date 2025-03-04
- EPSS: 2.28%
- CISA SSVC: exploitation active, automatable no, technical impact partial (assessed 2025-02-13)
- Weakness: CWE-59
- Published: 2025-02-11

## Affected versions

- Microsoft Windows 10 Version 1507: affected >= 10.0.10240.0 and < 10.0.10240.20915
- Microsoft Windows 10 Version 1607: affected >= 10.0.14393.0 and < 10.0.14393.7785
- Microsoft Windows 10 Version 1809: affected >= 10.0.17763.0 and < 10.0.17763.6893
- Microsoft Windows 10 Version 21H2: affected >= 10.0.19044.0 and < 10.0.19044.5487
- Microsoft Windows 10 Version 22H2: affected >= 10.0.19045.0 and < 10.0.19045.5487
- Microsoft Windows 11 version 22H2: affected >= 10.0.22621.0 and < 10.0.22621.4890
- Microsoft Windows 11 version 22H3: affected >= 10.0.22631.0 and < 10.0.22631.4890
- Microsoft Windows 11 Version 23H2: affected >= 10.0.22631.0 and < 10.0.22631.4890
- Microsoft Windows 11 Version 24H2: affected >= 10.0.26100.0 and < 10.0.26100.3194
- Microsoft Windows Server 2016: affected >= 10.0.14393.0 and < 10.0.14393.7785
- Microsoft Windows Server 2016 (Server Core installation): affected >= 10.0.14393.0 and < 10.0.14393.7785
- Microsoft Windows Server 2019: affected >= 10.0.17763.0 and < 10.0.17763.6893
- Microsoft Windows Server 2019 (Server Core installation): affected >= 10.0.17763.0 and < 10.0.17763.6893
- Microsoft Windows Server 2022: affected >= 10.0.20348.0 and < 10.0.20348.3207
- Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): affected >= 10.0.25398.0 and < 10.0.25398.1425
- Microsoft Windows Server 2025: affected >= 10.0.26100.0 and < 10.0.26100.3194
- Microsoft Windows Server 2025 (Server Core installation): affected >= 10.0.26100.0 and < 10.0.26100.3194

A version outside these ranges is not a statement that it is unaffected.

## References

- [patch] https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21391
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-21391

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.