Command injection in the administration interface in APSystems ECU-R version 5203 allows a remote unauthenticated attacker to execute arbitrary commands as root using the timezone parameter.
https://www.youtube.com/watch?v=YNeeaDPJOBY
https://web.archive.org/web/20230626075954/https://github.com/0xst4n/APSystems-ECU-R-RCE-Timezone