Comfast CF-WR631AX V3 up to 2.7.0.8 API Endpoint mbox-config?section=ping_config system destination os command injection

Summaryinfo

A vulnerability described as critical has been identified in Comfast CF-WR631AX V3 up to 2.7.0.8. Impacted is the function system of the file /cgi-bin/mbox-config?section=ping_config of the component API Endpoint. Such manipulation of the argument destination leads to os command injection. This vulnerability is listed as CVE-2026-12814. The attack may be performed from remote. In addition, an exploit is available. The vendor was contacted early about this disclosure but did not respond in any way.

Detailsinfo

A vulnerability was found in Comfast CF-WR631AX V3 up to 2.7.0.8. It has been rated as critical. Affected by this issue is the function system of the file /cgi-bin/mbox-config?section=ping_config of the component API Endpoint. The manipulation of the argument destination with an unknown input leads to a os command injection vulnerability. Using CWE to declare the problem leads to CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-12814. The exploitation is known to be easy. The attack may be launched remotely. Technical details as well as a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1202.

The exploit is available at github.com. It is declared as proof-of-concept. The vendor was contacted early about this disclosure but did not respond in any way.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-38200). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• Comfast

Name

• CF-WR631AX V3

Version

• 2.7.0.0
• 2.7.0.1
• 2.7.0.2
• 2.7.0.3
• 2.7.0.4
• 2.7.0.5
• 2.7.0.6
• 2.7.0.7
• 2.7.0.8

CPE 2.3info

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CPE 2.2info

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Submitinfo

Accepted

• Submit #837561: COMFAST CF-WR631AX V3-V2.7.0.8 OS Command Injection (by 0xcc12138)

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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