CVE-2025-21391 kev in the critical feed json
Windows Storage Elevation of Privilege Vulnerability
published 2025-02-11 20 mo ago modified 2026-09-24 45 d ago also EUVD-2025-2452
- cvss
- 7.1
- version 3.1, CNA
- cisa kev
- Exploited
- added 2025-02-11
- epss
- 2.3%
- EPSS 2.3% chance of exploitation in 30 days, percentile 83%
- public exploits
- 0
- none known
Summary
Windows Storage Elevation of Privilege Vulnerability
Patch / fix
cisa required action Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- Microsoft Windows 10 Version 1507 10.0.10240.20915
- Microsoft Windows 10 Version 1607 10.0.14393.7785
- Microsoft Windows 10 Version 1809 10.0.17763.6893
- Microsoft Windows 10 Version 21H2 10.0.19044.5487
- Microsoft Windows 10 Version 22H2 10.0.19045.5487
- Microsoft Windows 11 version 22H2 10.0.22621.4890
- Microsoft Windows 11 version 22H3 10.0.22631.4890
- Microsoft Windows 11 Version 23H2 10.0.22631.4890
- Microsoft Windows 11 Version 24H2 10.0.26100.3194
- Microsoft Windows Server 2016 10.0.14393.7785
- Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.7785
- Microsoft Windows Server 2019 10.0.17763.6893
- Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.6893
- Microsoft Windows Server 2022 10.0.20348.3207
- Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1425
- Microsoft Windows Server 2025 10.0.26100.3194
- Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.3194
Timeline
- 0-day patched (Project Zero)
- Added to CISA KEV
- Published
- CISA SSVC: exploitation active
- CISA patch deadline
Known exploited
- Added
- 20 mo ago
- Patch by
- 2025-03-04 (20 mo ago)
- Ransomware
- Not known
- Required action
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- Vendor, product
- Microsoft, Windows
- CISA name
- Microsoft Windows Storage Link Following Vulnerability
Zero-day
Detected in real attacks while still unknown to the vendor and the public, per Google Project Zero's 0day In-the-Wild tracker.
- Patched
- 2025-02-11
- Details
- project zero tracker
ATT&CK techniques
How it is exploited and what it leads to, in MITRE ATT&CK terms.
- T1068 Exploitation for Privilege Escalation exploitation
- T1485 Data Destruction primary impact
- T1490 Inhibit System Recovery primary impact
kev release 2025-07-28, att&ck v16.1. KEV to ATT&CK mappings by the MITRE Center for Threat-Informed Defense (Mappings Explorer, Apache-2.0). © 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation. Terms of use
CISA SSVC
- Exploitation
- Active, exploited in the wild
- Automatable
- no
- Technical impact
- partial
- Assessed
- 20 mo ago
Exploit prediction
2.28% chance of exploitation in the next 30 days, higher than 83% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.1 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H/E:F/RL:O/RC:C |
| CNA | 3.1 | 7.1 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H |
Affected products
- Microsoft Windows 10 Version 1507
- Microsoft Windows 10 Version 1607
- Microsoft Windows 10 Version 1809
- Microsoft Windows 10 Version 21H2
- Microsoft Windows 10 Version 22H2
- Microsoft Windows 11 version 22H2
- Microsoft Windows 11 version 22H3
- Microsoft Windows 11 Version 23H2
- Microsoft Windows 11 Version 24H2
- Microsoft Windows Server 2016
- Microsoft Windows Server 2016 (Server Core installation)
- Microsoft Windows Server 2019
- Microsoft Windows Server 2019 (Server Core installation)
- Microsoft Windows Server 2022
- Microsoft Windows Server 2022, 23H2 Edition (Server Core installation)
- Microsoft Windows Server 2025
- Microsoft Windows Server 2025 (Server Core installation)
Classification
- Weakness
-
- CWE-59 Improper Link Resolution Before File Access
References
-
msrc.microsoft.com
/update-guide/vulnerability/CVE-2025-21391
vendor-advisory, patch
-
cisa.gov
/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-21391
government-resource, us-government-resource
Sources
- CVE List CVE-2025-21391
- NVD CVE-2025-21391
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