CVE tracker / CVE-2025-21183
CVE-2025-21183
CVE-2025-21183 is the Windows Resilient File System (ReFS) Deduplication Service Elevation of Privilege Vulnerab. Microsoft rates it Important, CVSS 7.4. It is not in CISA's Known Exploited Vulnerabilities catalog. Published February 11, 2025.
Risk summary
HighElevation of Privilege
7.4
CVSS v3 base
0.5%
EPSS: chance of exploitation in 30 days
High
Severity
Important
Microsoft's rating
Less Likely
Microsoft: exploitation
No
In CISA KEV
How to fix it
Microsoft lists 4 affected products and the update that fixes each:
- KB5051987 · fixed build 10.0.26100.3194
Windows Server 2025, Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 24H2 for ARM64-based Systems, Windows Server 2025 (Server Core installation)
What Microsoft changed
- February 11, 2025: Information published.
Details
- Weakness
- CWE-415: Double Free
- Publicly disclosed (Microsoft)
- No
- Exploited (Microsoft)
- No
- Known exploited (CISA KEV)
- Not listed
- Published
- February 11, 2025
- Last revised
- February 11, 2025
Get told when this changes
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References
From Microsoft, CISA, NVD and FIRST data; the Microsoft details were read when this page was opened. Check the references above before you act.