CVE-2026-50501

HIGH

Windows Resilient File System (ReFS) Remote Code Execution Vulnerability

Title source: cna
STIX 2.1

Description

Stack-based buffer overflow in Windows Resilient File System (ReFS) allows an unauthorized attacker to execute code locally.

References (1)

Core 1
Core References
Vendor Advisory vendor-advisory patch
Windows Resilient File System (ReFS) Remote Code Execution Vulnerability
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50501

Scores

CVSS v3 7.8
EPSS 0.0034
EPSS Percentile 26.4%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-121
Status published
Products (9)
Microsoft/Windows 11 Version 24H2 10.0.26100.0 - 10.0.26100.8875
Microsoft/Windows 11 Version 25H2 10.0.26200.0 - 10.0.26200.8875
Microsoft/Windows 11 version 26H1 10.0.28000.0 - 10.0.28000.2525
Microsoft/Windows Server 2025 10.0.26100.0 - 10.0.26100.33158
Microsoft/Windows Server 2025 (Server Core installation) 10.0.26100.0 - 10.0.26100.33158
microsoft/windows_11_24h2 < 10.0.26100.8875 (2 CPE variants)
microsoft/windows_11_25h2 < 10.0.26200.8875 (2 CPE variants)
microsoft/windows_11_26h1 < 10.0.28000.2525 (2 CPE variants)
microsoft/windows_server_2025 < 10.0.26100.33158
Published Jul 14, 2026
Tracked Since Jul 14, 2026