# CVE-2026-11406: GL.iNet MT3000 command injection in OpenVPN Client Import Workflow

Source: https://junglewise.ai/threats/cve-2026-11406-gl-inet-mt3000-command-injection-in-openvpn-client-import  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-06. Updated: 2026-06-06  
License: CC BY 4.0 with a link back

CVE-2026-11406 · Severity: medium · CVSS 6.3 · Published 2026-06-06

A security vulnerability exists in GL.iNet MT3000 routers that allows an authorized user to take full control of the device. By uploading a specially crafted OpenVPN configuration file, an attacker can bypass security filters and execute commands with administrative privileges. This could lead to complete device compromise, unauthorized access to network traffic, or the use of the router as a foothold for further attacks.

Technologies: [GL.iNet MT3000](https://junglewise.ai/threats/technologies/mt3000). Vendors: [GL.iNet](https://junglewise.ai/threats/vendors/gl-inet).

## Quick answers

**Is CVE-2026-11406 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-11406 being exploited in the wild.

**How severe is CVE-2026-11406?** Medium severity, with a CVSS score of 6.3, published 6 June 2026.

**Which products and versions are affected?** GL.iNet MT3000 up to 4.4.5.

**Is there a fix for CVE-2026-11406?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-11406 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-11406?** Check whether you run GL.iNet MT3000 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

A command injection vulnerability exists in the OpenVPN client import workflow of GL.iNet MT3000 routers (firmware up to 4.4.5). The issue stems from insufficient validation of uploaded .ovpn configuration files in the 'ovpnclient.sh' script. While the script attempts to filter dangerous directives using 'sed', it only removes a small subset (daemon, dev, dev-type, tun-mtu), leaving over 200 other directives intact. Because the OpenVPN process is subsequently launched with '--script-security 3' as the root user, an authenticated attacker can use directives like 'up', 'down', or 'client-connect' to achieve arbitrary root command execution. A fix is available in firmware version 4.9.0_beta3-1012-0513-1778656146 and later.

## Affected products

- GL.iNet MT3000 (Beryl AX) up to 4.4.5

## Timeline

- 2026-05-06: disclosed: Initial submission by researcher StrTzz123
- 2026-06-06: advisory: CVE-2026-11406 published

## References

- [https://fw.gl-inet.cn/firmware/mt3000/testing/mt3000-4.9.0_beta3-1012-0513-1778656146.tar](https://fw.gl-inet.cn/firmware/mt3000/testing/mt3000-4.9.0_beta3-1012-0513-1778656146.tar)
- [https://github.com/StrTzz123/iot_vul/tree/main/GL-iNet/MT3000/4.4.5/ovpn_client_import](https://github.com/StrTzz123/iot_vul/tree/main/GL-iNet/MT3000/4.4.5/ovpn_client_import)
- [https://vuldb.com/cve/CVE-2026-11406](https://vuldb.com/cve/CVE-2026-11406)
- [https://vuldb.com/submit/820049](https://vuldb.com/submit/820049)
- [https://vuldb.com/vuln/368966](https://vuldb.com/vuln/368966)
- [https://vuldb.com/vuln/368966/cti](https://vuldb.com/vuln/368966/cti)

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