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CVE-2025-27738 · Windows Resilient File System (ReFS) Information Disclosure Vulnerability

Improper access control in Windows Resilient File System (ReFS) allows an authorized attacker to disclose information over a network.

Severity
Important
Impact
Information Disclosure
CVSS
6.5 base · 5.7 temporal
Release
2025-04-08
Signals
Windows Resilient File System (ReFS) Information Disclosure Exploited: No Publicly disclosed: No Exploitability: Exploitation Less Likely
CWE
CWE-284: Improper Access Control
Patch Diff
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Description
Improper access control in Windows Resilient File System (ReFS) allows an authorized attacker to disclose information over a network.
FAQ / Articles
Windows FileSystemWatcher Information Disclosure Vulnerability
Improper access control in Windows FileSystemWatcher allows an authorized attacker to disclose information over a network.
Windows Resilient File System (ReFS) Information Disclosure Vulnerability
Improper access control in Windows Resilient File System (ReFS) allows an authorized attacker to disclose information over a network.
FAQ
What type of information could be disclosed by this vulnerability? The type of information that could be disclosed if an attacker successfully exploited this vulnerability includes unauthorized access to the file system, specifically file path information.
FAQ
Are the updates for Windows 10 for x64-based Systems and Windows 10 for 32-bit Systems currently available? Yes. As of April 9, 2025, the security update (5055547) for Windows 10 for x64-based Systems and Windows 10 for 32-bit Systems are available. Customers running Windows 10 should ensure the update is installed to be protected from this vulnerability.
Mitigation
The following mitigating factors might be helpful in your situation: To mitigate against possible application compatibility risks, the fix to address this vulnerability has been released as disabled by default. However, administrators have been given the ability to enable this behavior if needed through a registry key. For specific instructions on how administrators can enable this behavior, please see the following article: https://support.microsoft.com/help/5058189