Summary
Impact: Remote Code Execution. Microsoft rating: Important. Not known to be exploited — Exploitation Unlikely. Customer action: Required.
Details
How could an attacker exploit this vulnerability?
An authenticated attacker with access to a shared folder on a system using a Resilient File System (ReFS) volume could exploit this vulnerability by running a specially crafted operation against the folder.
According to the CVSS metric, privileges required is low (PR:L). What does that mean for this vulnerability?
Any authenticated attacker could trigger this vulnerability. It does not require admin or other elevated privileges.
Security updates
10.0.26200.7462 — https://support.microsoft.com/help/5072033
10.0.26200.7392 — https://support.microsoft.com/help/5072014
10.0.20348.4529 — https://support.microsoft.com/help/5071547
10.0.20348.4467 — https://support.microsoft.com/help/5071413
10.0.22631.6345 — https://support.microsoft.com/help/5071417
10.0.25398.2025 — https://support.microsoft.com/help/5071542
Vulnerabilities 1
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High 8.8
Windows Resilient File System (ReFS) Remote Code Execution Vulnerability
Heap-based buffer overflow in Windows Resilient File System (ReFS) allows an authorized attacker to execute code over a network.
Revision history
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#1
Information published.
References
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CVE-2025-62456 Windows Resilient File System (ReFS) Remote Code Execution Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-62456
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss