Main Vulnerability Database Vulnerabilities #VU147850

Out-of-bounds read in Microsoft Windows and Windows Server - CVE-2026-69617

Published: September 8, 2026

Vulnerability identifier: #VU147850

CSH Severity: Low

CVSS v4: 7.3 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-69617

CWE-ID: CWE-125

Exploitation vector: Local access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to elevate privileges.

The vulnerability exists due to an out-of-bounds read in Windows Resilient File System (ReFS) when processing filesystem data. A local user can exploit the out-of-bounds read to elevate privileges.

Successful exploitation could grant SYSTEM privileges.

Affected software

Microsoft Windows
Windows Server

How to mitigate CVE-2026-69617

Install security update from vendor's website.

Microsoft Windows - update to 11 26H1 10.0.28000.2954
Windows Server - update to 2025 10.0.26100.33438

External References

Related Security Bulletins