Comfast · Cf-Xr11 · CVE-2025-57293
**Name of the Vulnerable Software and Affected Versions**
COMFAST CF-XR11 version V2.7.2
**Description**
A command injection issue exists in the multi pppoe API, processed by the `sub 423930` function. 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`. Specifically, 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.
**Recommendations**
As a temporary workaround, consider disabling the multi pppoe API until a patch is available.
Restrict access to the `/cgi-bin/mbox-config` endpoint to minimize the risk of exploitation.
Avoid using the `action` parameter with the value "one click redial" until the issue is resolved.