Reference page — cumulative record through Wednesday, October 7, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2025-21391

CVE-2025-21391HIGH

Microsoft Windows 10 Version 1507 — Windows Storage Elevation of Privilege Vulnerability

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   L   L   N  U  N  H  H    7.1   .0230   82.8   YES

AFFECTED
  Product                  Versions        Fixed
  Windows 10 Version 1507  10.0.10240.0 –  —
  Windows 10 Version 1607  10.0.14393.0 –  —
  Windows 10 Version 1809  10.0.17763.0 –  —
  Windows 10 Version 21H2  10.0.19044.0 –  —
  Windows 10 Version 22H2  10.0.19045.0 –  —
  Windows 11 version 22H2  10.0.22621.0 –  —
  Windows 11 version 22H3  10.0.22631.0 –  —
  Windows 11 Version 23H2  10.0.22631.0 –  —
  Windows 11 Version 24H2  10.0.26100.0 –  —
  Windows Server 2016      10.0.14393.0 –  —
  + 7 more

TIMELINE
  Dec 11  Reserved by microsoft
  Feb 11  Added to CISA KEV, remediation due 2025-03-04
  Feb 11  Published (CNA: microsoft)

CWE-59 · CNA: microsoft · CVSS v3.1 · 2 references · NVD status: Analyzed · KEV due March 4, 2025

Description

Windows Storage Elevation of Privilege Vulnerability

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
December 11, 2024	Reserved	Reserved by microsoft
February 11, 2025	KEV ADDED	Added to CISA KEV, remediation due 2025-03-04
February 11, 2025	Published	Published (CNA: microsoft)

Affected

Affected products and packages — 17 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Microsoft	Windows 10 Version 1507	—	10.0.10240.0	—
Microsoft	Windows 10 Version 1607	—	10.0.14393.0	—
Microsoft	Windows 10 Version 1809	—	10.0.17763.0	—
Microsoft	Windows 10 Version 21H2	—	10.0.19044.0	—
Microsoft	Windows 10 Version 22H2	—	10.0.19045.0	—
Microsoft	Windows 11 version 22H2	—	10.0.22621.0	—
Microsoft	Windows 11 version 22H3	—	10.0.22631.0	—
Microsoft	Windows 11 Version 23H2	—	10.0.22631.0	—
Microsoft	Windows 11 Version 24H2	—	10.0.26100.0	—
Microsoft	Windows Server 2016	—	10.0.14393.0	—
Microsoft	Windows Server 2016 (Server Core installation)	—	10.0.14393.0	—
Microsoft	Windows Server 2019	—	10.0.17763.0	—
Microsoft	Windows Server 2019 (Server Core installation)	—	10.0.17763.0	—
Microsoft	Windows Server 2022	—	10.0.20348.0	—
Microsoft	Windows Server 2022, 23H2 Edition (Server Core installation)	—	10.0.25398.0	—
Microsoft	Windows Server 2025	—	10.0.26100.0	—
Microsoft	Windows Server 2025 (Server Core installation)	—	10.0.26100.0	—

Weaknesses

CWE-59

References (2)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21391 [Patch, Vendor Advisory]
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-21391 [US Government Resource]

Authoritative record: CVE-2025-21391 at cve.org

Vendors: microsoft

Weaknesses: CWE-59

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2025-21391 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, October 7, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.