mikrotrik create a dynamic rule NAT dst-nat <IP wan:18368> to 0.0.0.0:18368

I don´t understand that routeros, create a rule.
I find the vulnerabilit in system, where the equipment use in small office, I change the Dlink to Mikrotik, that I so this vulnerabilit.
Please, I don´t get resolv the problem, I need the instruction.

Disable UPNP or fix whatever device on your network is making bad UPNP requests.

Resolved, Thanks !!!