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

16 Sep 2026, 12:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-16 12:17

Updated : 2026-09-16 12:17

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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