Apparently using Internet servers as they're intended to be used is "hacking" these days. If you put your printer on the Internet (with no access control)... why *wouldn't* you expect random people to print to it?https://techrad.io/technology/1975/a-fan-hacks-50000-printers-to-tell-people-to-subscribe-to-pewdiepie/amp/?__twitter_impression=true …
It's not an exploit, and some 12 years ago bored teenager me did the same thing to all the printers on a certain University network (from the outside). Seriously, this is old as heck. The strange thing is that nobody is running automated masscan printer spambots by now.
