Path traversal in Windows and Windows Server - CVE-2026-50454
Published: July 17, 2026
Vulnerability identifier: #VU138037
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-50454
CWE-ID: CWE-22
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Microsoft
Affected software:
Windows
Windows Server
Windows
Windows Server
Detailed vulnerability description
The vulnerability allows a local user to elevate privileges.
The vulnerability exists due to relative path traversal in Windows User Interface Core when handling local file paths. A local user can manipulate path input to elevate privileges.
Successful exploitation could allow deletion of arbitrary system files and lead to SYSTEM privileges.
How to mitigate CVE-2026-50454
Install security update from vendor's website.