[ CVE-2025-62221 · Published 9 Dec 2025 ]
Microsoft Windows Use After Free Vulnerability
Exploited · CISA KEV CVSS 7.8
EPSS 3%No fix listed yet
[ Why it matters ]Priority signals
- Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2025-12-09
[ Description ]Official description
Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.
CISA: Microsoft Windows Cloud Files Mini Filter Driver contains a use after free vulnerability that can allow an authorized attacker to elevate privileges locally.
[ Fixes ]Fixes and patches
CISA required action (US federal deadline 30 Dec 2025): Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.
[ References ]References
- msrc.microsoft.com/update-guide/vulnerability/CVE-2025-62221Vendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource