External Control of File Name or Path in Microsoft Windows and Windows Server - CVE-2026-69783

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Main Vulnerability Database Vulnerabilities #VU154421

External Control of File Name or Path in Microsoft Windows and Windows Server - CVE-2026-69783

Published: October 13, 2026


Vulnerability identifier: #VU154421
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-69783
CWE-ID: CWE-73
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to escalate privileges to SYSTEM.

The vulnerability exists due to external control of file names or paths in Windows Update when handling externally controlled file names or paths. A local user can control a file name or path to escalate privileges to SYSTEM.


Affected software

Microsoft Windows
Windows Server

How to mitigate CVE-2026-69783

Install security update from vendor's website.

Microsoft Windows - addressed in versions 11 23H2 10.0.22631.7652, 11 24H2 10.0.26100.9711, 11 25H2 10.0.26200.9711, 11 26H1 10.0.28000.3231
Windows Server - update to 2025 10.0.26100.33650

External References

Related Security Bulletins