Printing Errors or Lights & Stuck Print Jobs

Hello!

I bought this printer about a month ago. I set up the wireless for the printer with my wifi, and my understanding was that the printer is password protected just like my wifi, and uses the same password in order to print something. I have kept my printer plugged in, and in "sleep" mode since I set it up. Last night at about 11pm when I was in bed, the printer randomly turned on and printed out a "wireless network configuration page" which had a bunch of information on it including the IP address as well as listing my wifi name and the wifi names of my neighbors in the surrounding apartments.

I am trying to figure out why this printed, because I certainly didn't do it. Does someone have access to my wifi, or was someone maybe just trying to print something and selected my printer since it would show up on the "connections available list on anybody's computer, since the printer was turned on? How could they print this network configuration sheet if my printer is password protected?

I am mostly concerned about someone having access to my internet if they were able to somehow print out this page, but maybe it just happened when they were trying to connect to it, and it didn't work so they tried to troubleshoot MY printer?

I'd appreciate any insight on the issue.

Thanks!