Heap-based buffer overflow in Microsoft Windows and Windows Server - CVE-2025-62454

Vulnerability identifier: #VU119481

CSH Severity: Low

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-2025-62454

CWE-ID: CWE-122

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error in Windows Cloud Files Mini Filter Driver. A local user can pass specially crafted data to the application, trigger a heap-based buffer overflow and gain elevated privileges on the target system.

Microsoft Windows
Windows Server

Install updates from vendor's website.

Microsoft Windows - addressed in versions 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, 11 25H2 10.0.26200.7092
Windows Server - addressed in versions 2008 R2 6.1.7601.28021, 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-2025-62454

• Multiple vulnerabilities in Microsoft Windows Cloud Files Mini Filter Driver