CVE-2026-36801

Vulnerability

A buffer overflow vulnerability exists in the formIPMacBindAdd function of Shenzhen Tenda Technology Co., Ltd Tenda G0 version v15.11.0.5 [1]. The vulnerability is triggered when the IPMacBindRule parameter, influenced by a user, is processed by the websGetVar function and subsequently used in ipMacBindListStore via strcpy without proper bounds checking, leading to a buffer overflow [1]. The vulnerable path is reachable through a standard HTTP request.

Exploitation

An attacker can exploit this vulnerability by sending a crafted HTTP request to the formIPMacBindAdd CGI endpoint. The request must include a long string for the IPMacBindRule parameter, such as IPMacBindRule = a*888 or longer, to trigger the buffer overflow [1]. No specific network position, authentication, or user interaction beyond sending the request is required.

Impact

Successful exploitation of this vulnerability can lead to a Denial of Service (DoS) condition. This may manifest as a process crash or device instability, rendering the device unusable [1]. The scope of the compromise is limited to the availability of the device itself.

Mitigation

Shenzhen Tenda Technology Co., Ltd Tenda G0 version v15.11.0.5 is affected by this vulnerability [1]. A fixed version and release date are not yet disclosed in the available references. No workarounds or EOL status are mentioned. The vulnerability has not been listed as actively exploited in the wild.