# CVE-2026-58146: WNC T-Mobile 5G Box IDU OS command injection in portal.cgi

Source: https://junglewise.ai/threats/cve-2026-58146-wnc-t-mobile-5g-box-idu-os-command-injection-in-portal-cgi  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-16. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-58146 · Severity: info · Published 2026-09-16

The WNC T-Mobile 5G Box IDU is a 5G indoor router used by T-Mobile customers to provide network connectivity. A remote attacker can inject and execute arbitrary shell commands with root privileges through an unauthenticated endpoint, potentially leading to complete device compromise, network access theft, and customer data exposure.

Technologies: [WNC T-Mobile 5G Box IDU](https://junglewise.ai/threats/technologies/t-mobile-5g-box-idu). Vendors: [WNC](https://junglewise.ai/threats/vendors/wnc).

## Quick answers

**Is CVE-2026-58146 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-58146 being exploited in the wild.

**How severe is CVE-2026-58146?** Informational severity, published 16 September 2026.

**Which products and versions are affected?** WNC T-Mobile 5G Box IDU before 1.1.0.651412.

**Is there a fix for CVE-2026-58146?** A patch was published on 2026-09-16: Fixed in firmware version 1.1.0.651412 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-58146 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-58146?** Check whether you run WNC T-Mobile 5G Box IDU at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

This is an OS command injection vulnerability (CWE-78) in the /cgi-bin/portal.cgi endpoint, specifically within the cli_cookie POST parameter. The vulnerable code directly concatenates the cli_cookie parameter value into a find command string without sanitization or validation. No authentication is required—an attacker can reach this endpoint over the network and inject shell metacharacters to execute arbitrary commands with root privileges. The vulnerability allows complete system compromise including reading/modifying configuration, extracting credentials, and installing malware. The fix is available in firmware version 1.1.0.651412 and later.

## Affected products

- WNC T-Mobile 5G Box IDU before 1.1.0.651412

## Timeline

- 2026-09-16: disclosed
- 2026-09-16: patched: Fixed in firmware version 1.1.0.651412

## References

- [https://cert.pl/posts/2026/09/CVE-2026-40854](https://cert.pl/posts/2026/09/CVE-2026-40854)

## Related threats

- [WNC T-Mobile 5G Box IDU OS command injection in password change](https://junglewise.ai/threats/cve-2026-58147-wnc-t-mobile-5g-box-idu-os-command-injection-in-password-change)
- [WNC T-Mobile 5G Box IDU CSRF in portal.cgi](https://junglewise.ai/threats/cve-2026-40857-wnc-t-mobile-5g-box-idu-csrf-in-portal-cgi)
- [WNC T-Mobile 5G Box IDU improper access control in wnc_maccheck.cgi](https://junglewise.ai/threats/cve-2026-40856-wnc-t-mobile-5g-box-idu-improper-access-control-in-wnc-maccheck)
- [WNC T-Mobile 5G Box IDU command injection in ping functionality](https://junglewise.ai/threats/cve-2026-40855-wnc-t-mobile-5g-box-idu-command-injection-in-ping-functionality)
- [WNC T-Mobile 5G Box IDU authentication bypass in portal.cgi](https://junglewise.ai/threats/cve-2026-40854-wnc-t-mobile-5g-box-idu-authentication-bypass-in-portal-cgi)