CVE-2025-21271

Name: CVE-2025-21271
Creator: NVD / NIST
Published: 2025-01-14T18:15:46.747+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.53%

Last modified Jun 17, 2026

CVE-2025-21271 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability. EPSS estimates a 0.53% chance of exploitation in the next 30 days.

Description

Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

0.53%

40.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-126

Affected Software

Vendor	Product	Versions
Microsoft	Windows 10 1809	< 10.0.17763.6775
Microsoft	Windows 10 21h2	< 10.0.19044.5371
Microsoft	Windows 10 22h2	< 10.0.19045.5371
Microsoft	Windows Server 2019	< 10.0.17763.6775
Microsoft	Windows Server 2022	< 10.0.20348.3091

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21271Patch, Vendor Advisory

Timeline

Published: Jan 14, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-21271?

Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability

How severe is CVE-2025-21271?

CVE-2025-21271 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.53% probability of exploitation in the next 30 days.

How do I fix CVE-2025-21271?

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-2025-21271?

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

Scan your code now

Source: NVD / NIST