Use-after-free in Microsoft Windows and Windows Server - CVE-2025-62221

Vulnerability identifier: #VU119431

CSH Severity: High

CVSS v4: 8.5 [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]

CVE-ID: CVE-2025-62221

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: The vulnerability is being exploited in the wild

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.

Microsoft Windows
Windows Server

Install updates from vendor's website.

Microsoft Windows - addressed in versions 10 21H2 10.0.19043.6456, 10 21H2 10.0.19044.6691, 10 22H2 10.0.19045.6691, 10 1809 10.0.17763.8146, 11 23H2 10.0.22631.6345, 11 24H2 10.0.26100.7392, 11 24H2 10.0.26100.7462
Windows Server - addressed in versions 2008 6.0.6003.23666, 2019 10.0.17763.8146, 2022 23H2 10.0.25398.2025, 2022 10.0.20348.4467, 2022 10.0.20348.4529, 2025 10.0.26100.7392, 2025 10.0.26100.7462

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-62221

• Privilege escalation in Microsoft Windows Cloud Files Mini Filter driver