Hey everybody! Hope you’re doing all well

As mentioned in the title, I am willing to buy a second hand wifi router and I was wondering if there is any chance at all to be exposed to any kind of danger (I don’t know what kind of danger lol that’s a part of my doubts) To precise some stuff : I won’t connect it to internet, I’ll just use it in local communications between my computer and my phone. I’ll use a Mac, windows and an android cell phone

Cheers!