Over 50% of enterprise routers are not cleared of data before reselling them. This includes sensitive information like login credentials. Make sure your router creds are not out on the dark web, vulnerable to reuse.
The first thing you should do when starting a new cyber position is an inventory of networking and computer assets. But this also should be an ongoing practice. What is not known becomes an attack vector. Then you’ll be the smart guy. Save yourself from embarrassment…and worse.