A critical remote code execution (RCE) vulnerability exists in the web-based management interface of GatesAir Maxiva UAXT, VAXT transmitters when debugging mode is enabled. An attacker with a valid session ID (sess_id) can send specially crafted POST requests to the /json endpoint, enabling arbitrary command execution on the underlying system. This vulnerability can lead to full system compromise, including unauthorized access, privilege escalation, and potentially full device takeover.
The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.