GL.iNet GL-MT3000 up to 4.4.5 SET_USER_PWD /cgi-bin/glc FUN_0042e200 Password command injection

Summaryinfo

A vulnerability was found in GL.iNet GL-MT3000 up to 4.4.5 and classified as critical. Affected by this vulnerability is the function FUN_0042e200 of the file /cgi-bin/glc of the component SET_USER_PWD Handler. The manipulation of the argument Password results in command injection. This vulnerability is reported as CVE-2026-11452. The attack can be launched remotely. No exploit exists. It is suggested to upgrade the affected component. The vendor explains: " The current code escapes single quotes in the password parameter and handles it inside a shell single‑quote context. The payloads in the report, which rely on $() or backticks to trigger command substitution, are not executed under the current code path. We tested on a GL‑MT3000 device running firmware 4.8.1 using similar payloads, and no command‑execution marker file was created."

Detailsinfo

A vulnerability classified as critical has been found in GL.iNet GL-MT3000 up to 4.4.5. Affected is the function FUN_0042e200 of the file /cgi-bin/glc of the component SET_USER_PWD Handler. The manipulation of the argument password with an unknown input leads to a command injection vulnerability. CWE is classifying the issue as CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-11452. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1202.

The vendor explains: " The current code escapes single quotes in the password parameter and handles it inside a shell single‑quote context. The payloads in the report, which rely on $() or backticks to trigger command substitution, are not executed under the current code path. We tested on a GL‑MT3000 device running firmware 4.8.1 using similar payloads, and no command‑execution marker file was created."

Upgrading to version 4.8.1 eliminates this vulnerability.

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Productinfo

Vendor

• GL.iNet

Name

• GL-MT3000

Version

• 4.4.0
• 4.4.1
• 4.4.2
• 4.4.3
• 4.4.4
• 4.4.5

CPE 2.3info

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CPE 2.2info

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Submitinfo

Accepted

• Submit #826378: GL.iNet GL-MT3000 4.4.5 Command Injection (by strforexc)

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