Windows Storage
CVE-2025-21391 — Windows Storage Elevation of Privilege Vulnerability
Executive Summary
None
Overview
7.1
CVSS HIGH
Important
MS Severity
Exploited
MS Exploit Status
Exploitation Detected
MS Exploit Likelihood
CVSS Vector
ATTACK VECTOR
Local
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Unchanged
Temporal Score: 6.6
EPSS Score
0.02143
probability of exploitation in the next 30 days
0.79685 percentile - updated 2026-06-20
View on FIRST.org
Affected Products
27 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Windows 10 for 32-bit Systems | 5052040 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 for x64-based Systems | 5052040 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 1607 for 32-bit Systems | 5052006 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 1607 for x64-based Systems | 5052006 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 1809 for 32-bit Systems | 5052000 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 1809 for x64-based Systems | 5052000 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 21H2 for 32-bit Systems | 5051974 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 21H2 for ARM64-based Systems | 5051974 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 21H2 for x64-based Systems | 5051974 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 22H2 for 32-bit Systems | 5051974 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 22H2 for ARM64-based Systems | 5051974 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 22H2 for x64-based Systems | 5051974 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 11 Version 22H2 for ARM64-based Systems | 5051989 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 11 Version 22H2 for x64-based Systems | 5051989 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 11 Version 23H2 for ARM64-based Systems | 5051989 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 11 Version 23H2 for x64-based Systems | 5051989 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 11 Version 24H2 for ARM64-based Systems | 5051987 (Security Update) 5052105 (SecurityHotpatchUpdate) |
Important | Elevation of Privilege | Yes |
| Windows 11 Version 24H2 for x64-based Systems | 5051987 (Security Update) 5052105 (SecurityHotpatchUpdate) |
Important | Elevation of Privilege | Yes |
| Windows Server 2016 | 5052006 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows Server 2016 (Server Core installation) | 5052006 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows Server 2019 | 5052000 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows Server 2019 (Server Core installation) | 5052000 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows Server 2022 | 5051979 (Security Update) 5052106 (SecurityHotpatchUpdate) |
Important | Elevation of Privilege | Yes |
| Windows Server 2022 (Server Core installation) | 5051979 (Security Update) 5052106 (SecurityHotpatchUpdate) |
Important | Elevation of Privilege | Yes |
| Windows Server 2022, 23H2 Edition (Server Core installation) | 5051980 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows Server 2025 | 5051987 (Security Update) 5052105 (SecurityHotpatchUpdate) |
Important | Elevation of Privilege | Yes |
| Windows Server 2025 (Server Core installation) | 5051987 (Security Update) 5052105 (SecurityHotpatchUpdate) |
Important | Elevation of Privilege | Yes |
Patches
8 patches
| Article | Type | Restart |
|---|---|---|
5052040 |
Security Update | Yes |
5052006 |
Security Update | Yes |
5052000 |
Security Update | Yes |
5051974 |
Security Update | Yes |
5051989 |
Security Update | Yes |
5051987 (Security Update) 5052105 |
Security Update | Yes |
5051979 (Security Update) 5052106 |
Security Update | Yes |
5051980 |
Security Update | Yes |
Known Exploits
No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.
Acknowledgments
Microsoft has not published researcher acknowledgments for this CVE, or they are not yet reflected in our data source. Check the MSRC advisory directly for the most current credit information.
References
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