EnGenius ENH1350EXT A8J-ENH1350EXT devices through 3.9.3.2_c1.9.51 allow (blind) OS Command Injection via shell metacharacters to the Ping or Speed Test utility. During the time of initial setup, the device creates an open unsecured network whose admin panel is configured with the default credentials of admin/admin. An unauthorized attacker in proximity to the Wi-Fi network can exploit this window of time to execute arbitrary OS commands with root-level permissions.
The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.