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Vulnerability record · CVE-2025-62456 · published 9 December 2025

CVE-2025-62456: Microsoft windows 11 23h2 heap-based buffer overflow vulnerability

Microsoft · Windows 11 23h2

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

8.8 CVSS 3.1 High EPSS 1.1% · top 35.6% CWE-122 · Heap-based buffer overflow
8.8CVSS 3.1 base score
1.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
6Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

Description

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

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

Affected products

6 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Source: NIST National Vulnerability Database (record CVE-2025-62456), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.