December 9, 2025 · Applied Cybernetics Group
CVE-2025-62221 — Microsoft Windows
Microsoft Windows Use After Free Vulnerability
- Added to KEV
2025-12-09- Federal due date
2025-12-30- Vendor
- Microsoft
- Product
- Windows
- EPSS
- 82.0th percentile (score 0.024, as of
2026-07-13) - NVD CVSS v3.1
- 7.8 (HIGH)
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2025-62221
CISA short description
Microsoft Windows Cloud Files Mini Filter Driver contains a use after free vulnerability that can allow an authorized attacker to elevate privileges locally.
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.
NVD description
Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.