An issue was discovered on Phoenix Contact AXC F 2152 (No.2404267) before 2019.0 LTS and AXC F 2152 STARTERKIT (No.1046568) before 2019.0 LTS devices. Protocol Fuzzing on PC WORX Engineer by a man in the middle attacker stops the PLC service. The device must be rebooted, or the PLC service must be restarted manually via a Linux shell.