What’s Vulnerable › Vulnerabilities
CVE-2025-21183: Windows Resilient File System (ReFS) Deduplication Service Elevation of Privilege Vulnerability
- Severity: high (CVSS 7.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.5% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2025-02-11 · updated 2026-06-17
- Weakness: CWE-415
Description
Windows Resilient File System (ReFS) Deduplication Service Elevation of Privilege Vulnerability
Affected products
- Microsoft Windows 11: before 10.0.26100.3107 — fixed in 10.0.26100.3107
- Microsoft Windows Server 2025: before 10.0.26100.3107 — fixed in 10.0.26100.3107
- Microsoft Windows 11: from 10.0.26100.0 before 10.0.26100.3194 — fixed in 10.0.26100.3194
- Microsoft Windows Server 2025: from 10.0.26100.0 before 10.0.26100.3194 — fixed in 10.0.26100.3194
How to fix
Upgrade to a fixed version: Microsoft Windows 11 10.0.26100.3107; Microsoft Windows Server 2025 10.0.26100.3107; Microsoft Windows 11 10.0.26100.3194; Microsoft Windows Server 2025 10.0.26100.3194. Check the vendor advisory for mitigations.
References
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