Vulnerability · Published Dec 9, 2025 · Assigned by microsoft
CVE-2025-62456Windows Resilient File System (ReFS) Remote Code Execution Vulnerability
High 8.8
In plain English
A high-severity heap buffer overflow in Windows 11 version 22H3 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 66% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)1.1%top 34.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Heap-based buffer overflow in Windows Resilient File System (ReFS) allows an authorized attacker to execute code over a network.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 11 version 22H3 | 10.0.22631.0 – before 10.0.22631.6345 |
| Microsoft | Windows 11 Version 23H2 | 10.0.22631.0 – before 10.0.22631.6345 |
| Microsoft | Windows 11 Version 24H2 | 10.0.26100.0 – before 10.0.26100.7462 |
| Microsoft | Windows 11 Version 25H2 | 10.0.26200.0 – before 10.0.26200.7462 |
| Microsoft | Windows Server 2022 | 10.0.20348.0 – before 10.0.20348.4529 |
| Microsoft | Windows Server 2022, 23H2 Edition (Server Core installation) | 10.0.25398.0 – before 10.0.25398.2025 |
| Microsoft | Windows Server 2025 | 10.0.26100.0 – before 10.0.26100.7462 |
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0 – before 10.0.26100.7462 |
Weakness: CWE-122 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
References
- Windows Resilient File System (ReFS) Remote Code Execution Vulnerability vendor-advisory, patch