Yachtcontrol through 2019-10-06: It's possible to perform direct Operating System commands as an unauthenticated user via the "/pages/systemcall.php?command={COMMAND}" page and parameter, where {COMMAND} will be executed and returning the results to the client. Affects Yachtcontrol webservers disclosed via Dutch GPRS/4G mobile IP-ranges. IP addresses vary due to DHCP client leasing of telco's.

References

• https://nvd.nist.gov/vuln/detail/CVE-2019-17270
• https://www.exploit-db.com/exploits/47760
• http://packetstormsecurity.com/files/155582/Yachtcontrol-2019-10-06-Remote-Code-Execution.html