Knowing the password is useless if you don't know where to type it. ZKTeco devices have three distinct "roles." The default password works for the only.
For a vast majority of ZKTeco time attendance and access control terminals (such as the popular K-Series, i-Series, and older LED screen models), the default credentials are: zkteco default user id and password
The most obvious reason the default fails is that a previous administrator changed it. In corporate environments, IT policy often mandates changing default passwords immediately. If the previous administrator has left the company without documenting the password, you are effectively locked out. Knowing the password is useless if you don't
Many older ZKTeco devices use the UDP port 4370 for communication. Researchers have found that commands can sometimes be sent to these devices without needing the password at all if the network is exposed [5]. In corporate environments, IT policy often mandates changing