The KuWFi 4G AC900 LTE router 1.0.13 is vulnerable to command injection on the HTTP API endpoints /goform/formMultiApnSetting and /goform/atCmd. An authenticated attacker can execute arbitrary OS commands with root privileges via shell metacharacters in parameters such as pincode and cmds. Exploitation can lead to full system compromise, including enabling remote access (e.g., enabling telnet).

The KuWFi 4G LTE AC900 router 1.0.13 is vulnerable to Cross-Site Request Forgery (CSRF) on its web management interface. This vulnerability allows an attacker to trick an authenticated admin user into performing unauthorized actions, such as exploiting a command injection vulnerability in /goform/formMultiApnSetting. Successful exploitation can also lead to unauthorized configuration changes.

A stack-based buffer overflow exists in the GoAhead-Webs HTTP daemon on KuWFi 4G LTE AC900 devices with firmware 1.0.13. The /goform/formMultiApnSetting handler uses sprintf() to copy the user-supplied pincode parameter into a fixed 132-byte stack buffer with no bounds checks. This allows an attacker to corrupt adjacent stack memory, crash the web server, and (under certain conditions) may enable arbitrary code execution.