device unreachable

Hello, for unknown reasons an RB metal 2SHPn (ros 6.27) has now self-assumed address 0.0.0.0 and is unreachable with winbox also using his mac address. Does exist any trick to try the connection? Only to avoid a climb 25 meters high on the mast of a sailboat…
Thank you
Screenshot 2019-05-07 13.16.34.png

You sure dare to run old sofware… maybe without firewall too? So it has been hacked now?
What happens after powercycle? I presume it immediately is unreachable?
Unfortunately with MikroTIk (contrary to some other manufacturer) there is no “remote reset button” on the power inserter…