CVE-2025-62456

Name: CVE-2025-62456
Creator: NVD / NIST
Published: 2025-12-09T18:15:57.143+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 1.00%

Last modified Jun 17, 2026

CVE-2025-62456 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Heap-based buffer overflow in Windows Resilient File System (ReFS) allows an authorized attacker to execute code over a network.. EPSS estimates a 1.00% chance of exploitation in the next 30 days.

Description

Heap-based buffer overflow in Windows Resilient File System (ReFS) allows an authorized attacker to execute code over a network.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.00%

58.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-122

Affected Software

Vendor	Product	Versions
Microsoft	Windows 11 23h2	< 10.0.22631.6345
Microsoft	Windows 11 24h2	< 10.0.26100.7392
Microsoft	Windows 11 25h2	< 10.0.26200.7392
Microsoft	Windows Server 2022	< 10.0.20348.4467
Microsoft	Windows Server 2022 23h2	< 10.0.25398.2025
Microsoft	Windows Server 2025	< 10.0.26100.7392

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-62456Vendor Advisory

Timeline

Published: Dec 9, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-62456?

Heap-based buffer overflow in Windows Resilient File System (ReFS) allows an authorized attacker to execute code over a network.

How severe is CVE-2025-62456?

CVE-2025-62456 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.00% probability of exploitation in the next 30 days.

How do I fix CVE-2025-62456?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-62456?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST