CVE DATABASE / CVE-2025-62221
CVE-2025-62221
Microsoft Windows Use After Free Vulnerability
CVSS 7.8 · HIGH
⚠ CISA KEV — ACTIVELY EXPLOITED
On the CISA KEV catalog
Confirmed exploited in the wild. Added 2025-12-09.
Federal remediation due 2025-12-30.
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Summary
Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.
CVSS 3.1 breakdown
| Base score | 7.8 (HIGH) |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| Attack vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity | HIGH |
| Availability | HIGH |
Weakness type (CWE)
Affected products
Microsoft windows 10 1809Microsoft windows 10 21h2Microsoft windows 10 22h2Microsoft windows 11 23h2Microsoft windows 11 24h2Microsoft windows 11 25h2Microsoft windows server 2019Microsoft windows server 2022Microsoft windows server 2022 23h2Microsoft windows server 2025
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References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-62221
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-62221
Data: NIST NVD + CISA KEV. NVD last modified 2025-12-10. Always verify against the vendor advisory before acting.