For "locked" HMIs where the password is required to update firmware, hackers utilized "unauthorized firmware" patches. In 2021, several tools surfaced capable of flashing a modified version of the OS (often based on Windows CE or Embedded Linux) that bypasses the password check routine during boot-up.
: It is primarily used by automation professionals and technicians to restore access to Programmable Logic Controllers (PLCs) and Human Machine Interfaces (HMIs) when passwords are lost. plc+hmi+password+unlock+v42+2021
If you do not need the existing program and just want to regain control of the hardware: For "locked" HMIs where the password is required
If you have forgotten a password for a device you own, official channels are the safest route: If you do not need the existing program
Most machines have a service tag. The original builder often keeps a master project file. Even if they charge a service fee, it is significantly cheaper than replacing a $5,000 HMI. 2. Check for Default Credentials
An engineer leaves the company without documenting the project passwords.