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9.4

T-Mobile 5G Box IDU router allows remote code execution

CVE-2026-58146 · published 27 days ago
Summary

The T-Mobile 5G Box IDU router can let anyone on the internet run any command on the device with full system privileges because a web request parameter is not checked properly. This could let attackers take control of the router and any network behind it. Updating the router to firmware version 1.1.0.651412 resolves the issue.

What to do
  • Update wnc t-mobile 5g box idu to version 1.1.0.651412 or later.
Affected software
VendorProductAffected versions
wnc t-mobile 5g box idu < 1.1.0.651412
Original advisory text
Unauthorized remote code execution in T-Mobile 5G Box IDU routers
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
References
Fix within
Internet-facing 14 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker full control
Severity
9.4 Critical
Exploitation
3% chance of attack within 30 days
Type
CWE-78OS Command Injection
Timeline
Published16 Sep 2026
Updated12 Oct 2026
First seen16 Sep 2026
Sources
CVE-2026-58146 · NVD
CVE-2026-58146 · MITRE
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