The vulnerability of the CX-Programmer and micro-programming software of PLC Omron CJ2M and Omron CJ2H lies in the reversibility of the password encoding method. This allows attackers to obtain access passwords to the controllers.

The vulnerability of the development environment “CX-Programmer,” which is part of the software suite “CX-One” designed for programming and configuring Omron PLCs, as well as Omron microcontrollers like CJ2M and CJ2H, is related to the reversibility of the password encoding method. Exploiting thi...