With great shell access comes great responsibility. Use these credentials only on devices you own or have explicit permission to test.
Ensure the device is behind a robust firewall that blocks port 23 from external traffic. If you'd like, I can help you further if you tell me: The specific model number of your ZKTeco device. zmm220 default telnet password
Using default or easily guessable passwords poses significant security risks. Unauthorized access to a device or system can lead to data breaches, system compromise, and other security issues. With great shell access comes great responsibility
Many of these devices use (Telnet, HTTP) and hardcoded credentials, making them highly vulnerable to network-based attacks. It is strongly recommended to: Disable Telnet if not actively needed for maintenance. HTTP) and hardcoded credentials