CVE-2026-40855

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

CVSS

No CVSS.

References

Link	Resource
https://cert.pl/posts/2026/09/CVE-2026-40854

Configurations

No configuration.

History

28 Sep 2026, 23:10

Type	Values Removed	Values Added
Summary		(es) El router WNC T-Mobile 5G Box IDU es vulnerable a una inyección de comandos. La vulnerabilidad existe en la funcionalidad de ping dentro del endpoint /cgi-bin/portal.cgi, afectando específicamente a los parámetros POST ping_ip, ping_size y ping_times. La causa raíz es la falta de verificación y saneamiento de la entrada proporcionada por el usuario antes de incorporarla a un comando del sistema. Esto permite a un atacante autenticado ejecutar comandos arbitrarios en la shell y obtener acceso de root al sistema. Este problema ha sido solucionado en la versión de firmware 1.1.0.651412.

16 Sep 2026, 12:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-16 12:17

Updated : 2026-09-28 23:10

NVD link : CVE-2026-40855

Mitre link : CVE-2026-40855

CVE.ORG link : CVE-2026-40855

JSON object : View

Products Affected

No product.

CWE

CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

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