CVE-2025-55687

HIGH

Windows ReFS - Privilege Escalation

Title source: llm

Description

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Resilient File System (ReFS) allows an unauthorized attacker to elevate privileges locally.

References (1)

[Vendor Advisory] https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-55687

Scores

CVSS v3 7.4

EPSS 0.0008

EPSS Percentile 22.3%

Attack Vector LOCAL

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

Classification

CWE

CWE-362 CWE-416

Status published

Affected Products (16)

microsoft/windows_10_1507 < 10.0.10240.21161

microsoft/windows_10_1607 < 10.0.14393.8519

microsoft/windows_10_1809 < 10.0.17763.7919

microsoft/windows_10_21h2 < 10.0.19044.6456

microsoft/windows_10_22h2 < 10.0.19045.6456

microsoft/windows_11_22h2 < 10.0.22621.6060

microsoft/windows_11_23h2 < 10.0.22631.6060

microsoft/windows_11_24h2 < 10.0.26100.6899

microsoft/windows_11_25h2 < 10.0.26200.6899

microsoft/windows_server_2012

microsoft/windows_server_2016 < 10.0.14393.8519

microsoft/windows_server_2019 < 10.0.17763.7919

microsoft/windows_server_2022 < 10.0.20348.4294

microsoft/windows_server_2022_23h2 < 10.0.25398.1913

... and 1 more

Timeline

Published Oct 14, 2025

Tracked Since Feb 18, 2026