CVE-2026-58147: Authorized remote code execution via password change functionality in T-Mobile 5G Box IDU routers

Severity: critical (CVSS 9.3 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-16 · updated 2026-09-28
Weakness: CWE-78

Description

WNC T-Mobile 5G Box IDU router contains an OS command injection vulnerability in the portal.cgi component's password change functionality. The application improperly neutralizes special elements in the http_passwd_hidden and http_passwdConfirm_hidden parameters, allowing an authenticated attacker to execute arbitrary commands on the underlying operating system with root privileges.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

How to fix

Upgrade to a fixed version: WNC T-Mobile 5G Box IDU 1.1.0.651412. Check the vendor advisory for mitigations.

References

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

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