Comfast CF-XR11 2.7.2 POST Request /usr/bin/webmgnt system command injection

Summaryinfo

A vulnerability classified as critical has been found in Comfast CF-XR11 2.7.2. Impacted is the function system of the file /usr/bin/webmgnt of the component POST Request Handler. This manipulation causes command injection. This vulnerability is tracked as CVE-2025-57293. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability has been found in Comfast CF-XR11 2.7.2 and classified as critical. Affected by this vulnerability is the function system of the file /usr/bin/webmgnt of the component POST Request Handler. The manipulation with an unknown input leads to a command injection vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A command injection vulnerability in COMFAST CF-XR11 (firmware V2.7.2) exists in the multi_pppoe API, processed by the sub_423930 function in /usr/bin/webmgnt. The phy_interface parameter is not sanitized, allowing attackers to inject arbitrary commands via a POST request to /cgi-bin/mbox-config?method=SET§ion=multi_pppoe. When the action parameter is set to "one_click_redial", the unsanitized phy_interface is used in a system() call, enabling execution of malicious commands. This can lead to unauthorized access to sensitive files, execution of arbitrary code, or full device compromise.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2025-57293 since 08/17/2025. The exploitation appears to be easy. The attack can be launched remotely. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/19/2025). The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

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

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Productinfo

Vendor

• Comfast

Name

• CF-XR11

Version

• 2.7.2

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CPE 2.2info

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