For PLCs with memory card or project password set in 2021 firmware:

: Connect your PC to the device and identify the communication port (COM port).

Tools in this classification recover passwords through a few predictable security loopholes inherent to older industrial hardware:

Store all industrial passwords in an enterprise-grade, encrypted password manager accessible only to authorized engineering personnel.

: Released in March 2021, this tool exploits EtherNet/IP vulnerabilities in Rockwell MicroLogix PLCs. It can read protection passwords, overwrite them, erase memory, and even "brick" devices. However, Rockwell's "Enhanced Password Security" mode—which is not enabled by default—blocks these exploits when activated.

The threat is not theoretical. An attacker who compromises a PLC can alter actuator behavior, change safety setpoints, and override critical system interlocks—leading to halted production, equipment damage, or hazardous operating conditions.