High · 7.4 CVE-2025-21183 EUVD-2025-2262GHSA-c228-pg9x-pq8r

Windows Resilient File System (ReFS) Deduplication Service Elevation of Privilege Vulnerability

Published Feb 11, 2025 · Updated Feb 26, 2026 · Assigned by microsoft

Vendor: Microsoft Product: Windows 11 Version 24H2 Product: Windows Server 2025 Product: Windows Server 2025 (Server Core installation) Platform: Windows

Description

Windows Resilient File System (ReFS) Deduplication Service Elevation of Privilege Vulnerability

Affected products

Vendor	Product	Affected	Fixed
Microsoft	Windows 11 Version 24H2	10.0.26100.0 – < 10.0.26100.3194	10.0.26100.3194
Microsoft	Windows Server 2025	10.0.26100.0 – < 10.0.26100.3194	10.0.26100.3194
Microsoft	Windows Server 2025 (Server Core installation)	10.0.26100.0 – < 10.0.26100.3194	10.0.26100.3194

Advisories 3

WID-SEC-2025-0331 Microsoft Windows: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 29, 2025
NCSC-2025-0047 Kwetsbaarheden verholpen in Microsoft Windows NCSC-NL (Netherlands) · Feb 11, 2025
MSRC-CVE-2025-21183 Windows Resilient File System (ReFS) Deduplication Service Elevation of Privilege Vulnerability Microsoft Security Response Center · Feb 11, 2025

References

Windows Resilient File System (ReFS) Deduplication Service Elevation of Privilege Vulnerability vendor-advisory patch