How to fix privacy warning for Wi-Fi

The password is a series of numbers, no letters or special characters. This was provided by an Internet company that services our entire building. When I asked about it, they said we were protected by three firewalls. Should I still be concerned?

I told the Internet company about the weak password, and they said I shouldn’t worry because they have us surrounded by three firewalls. Is this possible? Thanks to all that have taking the time to answer my question.

Here’s an addendum to the message below: the Internet company says this is an An Apple issue. Other devices don’t show a privacy morning.