EnGenius EWS356-FIT devices through 1.1.30 allow blind OS command injection. This allows an attacker to execute arbitrary OS commands via shell metacharacters to the Ping and Speed Test utilities.
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.