CVE-2025-21183

Name: CVE-2025-21183
Creator: NVD / NIST
Published: 2025-02-11T18:15:29.993+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.4/10EPSS 0.50%

Last modified Jun 17, 2026

CVE-2025-21183 is a high-severity vulnerability rated 7.4/10 on the CVSS scale. Windows Resilient File System (ReFS) Deduplication Service Elevation of Privilege Vulnerability. EPSS estimates a 0.50% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

7.4/10

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

EPSS Probability

0.50%

38.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-415

Affected Software

Vendor	Product	Versions
Microsoft	Windows 11 24h2	< 10.0.26100.3107
Microsoft	Windows Server 2025	< 10.0.26100.3107

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21183Patch, Vendor Advisory

Timeline

Published: Feb 11, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-21183?

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

How severe is CVE-2025-21183?

CVE-2025-21183 has a CVSS score of 7.4/10 (HIGH severity). The EPSS model estimates a 0.50% probability of exploitation in the next 30 days.

How do I fix CVE-2025-21183?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-21183?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST