CVE-2026-40855 — Command Injection in T-Mobile 5G Box IDU router via ping functionality
WNC T-Mobile 5G Box IDU router is vulnerable to a command injection. The vulnerability exists in the ping functionality within the /cgi-bin/portal.cgi endpoint, specifically aff…
Published: 2026-09-16 · CVSS: 9.3 · CVSS 4.0
WNC T-Mobile 5G Box IDU router is vulnerable to a command injection. The vulnerability exists in the ping functionality within the /cgi-bin/portal.cgi endpoint, specifically affecting the ping_ip, ping_size, and ping_times POST parameters. The root cause is the failure to verify and sanitize user-supplied input before incorporating it into a system command. This allows an authenticated attacker to execute arbitrary commands on the shell and gain root access to the system.This issue has been fixed in firmware version 1.1.0.651412
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7