CVE-2025-21183 — HIGH (7.4)

Q: What is CVE-2025-21183?

CVE-2025-21183 is a vulnerability with a CVSS score of 7.4 (HIGH). Windows Resilient File System (ReFS) Deduplication Service Elevation of Privilege Vulnerability

Q: How severe is CVE-2025-21183?

CVE-2025-21183 has been rated HIGH with a CVSS base score of 7.4/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2025-21183?

Check the references section above for vendor advisories and patch information. Affected products include: Microsoft Windows 11 24H2, Microsoft Windows Server 2025.

Vulnerability Description

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

CVSS Score

7.4

HIGH

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Microsoft	Windows 11 24H2	< 10.0.26100.3107
Microsoft	Windows Server 2025	< 10.0.26100.3107

Related Weaknesses (CWE)

CWE-415

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21183PatchVendor Advisory

FAQ

What is CVE-2025-21183?

CVE-2025-21183 is a vulnerability with a CVSS score of 7.4 (HIGH). Windows Resilient File System (ReFS) Deduplication Service Elevation of Privilege Vulnerability

How severe is CVE-2025-21183?

CVE-2025-21183 has been rated HIGH with a CVSS base score of 7.4/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2025-21183?

Check the references section above for vendor advisories and patch information. Affected products include: Microsoft Windows 11 24H2, Microsoft Windows Server 2025.