The default username for MikroTik devices is admin , and the default password is usually left blank. This means that when you first connect to your MikroTik device, you can log in using the username admin with no password.
Even more critical is how MikroTik handles access on Layer 2. By default, MikroTik devices have MAC Telnet enabled. This allows access to the router configuration directly via the MAC address, bypassing IP routing. default mikrotik password