#VU119431 Use-after-free in Windows and Windows Server - CVE-2025-62221
Published: December 9, 2025
Vulnerability identifier: #VU119431
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber
CVE-ID: CVE-2025-62221
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
The vulnerability is being exploited in the wild
Vulnerable software:
Windows
Windows Server
Windows
Windows Server
Software vendor:
Microsoft
Microsoft
Description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the Windows Cloud Files Mini Filter driver. A local user can trigger a use-after-free error and execute arbitrary code with SYSTEM privileges.
Note, the vulnerability is being actively exploited in the wild.
Remediation
Install updates from vendor's website.