Is CVE-2025-62221 being actively exploited?

Yes. CVE-2025-62221 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added on December 9, 2025.

What is the CVSS score for CVE-2025-62221?

CVE-2025-62221 has a CVSS 3.1 base score of 7.8 (HIGH).

CVE-2025-62221

HIGH · CVSS 7.8CISA KEV: actively exploitedEPSS 2.5%EU EUVD: exploited

Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.

Key facts

CVSS score: 7.8 (v3.1)
Severity: HIGH
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-416
EPSS score: 2.5% (84th percentile)
In CISA KEV: Yes, added December 9, 2025
In EU EUVD: Yes (EUVD-2025-202200)
Published: December 9, 2025
NVD last modified: September 25, 2026
Status: Analyzed

CISA Known Exploited Vulnerability

Microsoft Windows Use After Free Vulnerability

Added to the KEV catalog on December 9, 2025; federal remediation due December 30, 2025.

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2025-202200 in the EU Vulnerability Database. ENISA flags it as known exploited. Last updated in EUVD on April 16, 2026.

View on the EU Vulnerability Database

Affected products

microsoft / windows 10 1809
microsoft / windows 10 1809
microsoft / windows 10 21h2
microsoft / windows 10 22h2
microsoft / windows 11 23h2
microsoft / windows 11 24h2
microsoft / windows 11 25h2
microsoft / windows server 2019
microsoft / windows server 2022
microsoft / windows server 2022 23h2
microsoft / windows server 2025

Certified products that may be affected

1 FIPS 140 or Common Criteria certified product, from automated matching by sec-certs.org.

Microsoft Windows 10 and Server version 1903 (May 2019 Update) - Microsoft Corporation - Common Criteria 2019-22-INF-2839 - archived

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-62221(Vendor Advisory)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-62221(US Government Resource)

Last updated September 27, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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