: Once inside the menu, navigate to User Management to delete or change the forgotten administrator account. Alternative Reset Methods (No Software Required)

: Security researchers at Kaspersky have noted that ZKTeco terminals can have vulnerabilities that allow attackers to bypass authentication; using unofficial tools could further expose your network.

Check the exact HH:MM displayed on the device screen (e.g., 14:20). Calculate the Code: Subtract the time from 9999 (e.g., Square the result (e.g., Enter the Admin Mode: button on the device. When it asks for the Admin ID, enter Input Password: