This vulnerability in Tenda CX12L firmware 16.03.53.12 involves a stack-based buffer overflow triggered by manipulating the schedStartTime or schedEndTime parameters in the setSchedWifi function of the Wi-Fi Schedule Configuration Endpoint (/goform/openSchedWifi). The flaw allows remote attackers to overflow the stack, potentially leading to arbitrary code execution or denial of service. The vulnerability has a CVSS 4.0 score of 8.7, indicating high severity with network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability. No official patch or remediation level is currently documented.

Successful exploitation can lead to a stack-based buffer overflow, which may allow remote attackers to execute arbitrary code or cause denial of service on the affected device. The vulnerability impacts confidentiality, integrity, and availability of the device. Exploit code is publicly available, increasing the risk of exploitation. However, there are no known exploits in the wild at this time.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should consider restricting remote access to the affected endpoint and monitor for unusual activity. Avoid exposing the Wi-Fi Schedule Configuration interface to untrusted networks. Follow vendor communications for updates on patches or official mitigations.