If you absolutely cannot reach the manufacturer (e.g., the company went bankrupt), there is a physical method that is safer than downloading random tools.

The safest and most effective way to reset a password is through official software provided by the manufacturer. These tools are designed to communicate directly with your device over a local network.

These require flashing a modified firmware file that disables password protection. This is a last resort, as it can brick your device.

This requires a screwdriver, not a download.