CVE-2025-62456

Windows Resilient File System (ReFS) Remote Code Execution Vulnerability

HIGH 8.8

At a glance

Source: NVD
EPSS: EPSS 1.10 % · percentile 66 (2026-10-28)
State: PUBLISHED
Published: 2025-12-09 17:55 UTC
Updated: 2026-04-16 14:18 UTC
Assigner: microsoft
NVD status: Analyzed

Description

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

Weaknesses (CWE)

CWE-122 — Heap-based Buffer Overflow

References

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

Scores

Version	Score	Vector	Scored by
CVSS 3.1	HIGH 8.8	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	microsoft
CVSS 3.1	HIGH 8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	NVD · secure@microsoft.com (Secondary)

European references

ENISA EUVD · EUVD-2025-202254
GCVE · GCVE-0-2025-62456

CERT-FR advisories

CERTFR-2025-AVI-1092 — Multiples vulnérabilités dans Microsoft Windows · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:* < 10.0.22631.6345
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:*:* < 10.0.26100.7392
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:*:* < 10.0.26200.7392
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* < 10.0.20348.4467
cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:* < 10.0.25398.2025
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:* < 10.0.26100.7392

Affected products

Product	Versions
Microsoft · Windows 11 version 22H3	affected 10.0.22631.0 < 10.0.22631.6345
Microsoft · Windows 11 Version 23H2	affected 10.0.22631.0 < 10.0.22631.6345
Microsoft · Windows 11 Version 24H2	affected 10.0.26100.0 < 10.0.26100.7462
Microsoft · Windows 11 Version 25H2	affected 10.0.26200.0 < 10.0.26200.7462
Microsoft · Windows Server 2022	affected 10.0.20348.0 < 10.0.20348.4529
Microsoft · Windows Server 2022, 23H2 Edition (Server Core installation)	affected 10.0.25398.0 < 10.0.25398.2025
Microsoft · Windows Server 2025	affected 10.0.26100.0 < 10.0.26100.7462
Microsoft · Windows Server 2025 (Server Core installation)	affected 10.0.26100.0 < 10.0.26100.7462

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD