CVE-2026-58146: Wnc T-Mobile 5g Box Idu

Critical severity, CVSS 9.4. EPSS: 2.9% chance of exploitation in the next 30 days.

WNC T-Mobile 5G Box IDU router is vulnerable to OS command injection vulnerability. The vulnerability exists within the /cgi-bin/portal.cgi endpoint, specifically through the cli_cookie POST parameter. The cli_cookie parameter value is directly concatenated into a find command string without proper sanitization. This allows a remote, unauthenticated attacker to inject and execute arbitrary shell commands as root on the underlying operating system. This issue has been fixed in firmware version 1.1.0.651412

Affected products

• Wnc T-Mobile 5g Box Idu: before 1.1.0.651412 (fixed in 1.1.0.651412)

Published 2026-09-16. Last modified 2026-09-28.