Heap-based buffer overflow in Microsoft Windows and Windows Server - CVE-2025-62456
Published: December 9, 2025
Vulnerability identifier: #VU119483
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-62456
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in Windows Resilient File System (ReFS). A remote user can pass specially crafted data to the application, trigger a heap-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
Microsoft Windows
Windows Server
Windows Server
How to mitigate CVE-2025-62456
Install updates from vendor's website.
Microsoft Windows - addressed in versions 11 23H2 10.0.22631.6345, 11 24H2 10.0.26100.7392, 11 24H2 10.0.26100.7462
Windows Server - addressed in versions 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
Windows Server - addressed in versions 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