Few people place printers on their list of devices vulnerable to hacking, even though they have the same internet connection capabilities as any other smart gadget on the local network. This connectivity turns these devices into an attack vector that could let hackers roam free on your LAN. A hacker compromising their printing systems would hit the jackpot, getting access to documents belonging to clients to help prepare a much more effective attack against targets with deeper pockets. The success of a successful attack depends on the quality of the information at hand, and business documents are a valuable asset.”]
Source: https://www.bitdefender.com/blog/hotforsecurity/smart-printers-need-smart-defenses/