“People underestimate how easy a malicious hacker could have used a vulnerability like this to cause major havoc,” TheHackerGiraffe said. “Hackers could have stolen files, installed malware, caused physical damage to the printers and even use the printer as a foothold into the inner network. “The most horrifying part is: I never considered hacking printers before, the whole learning, downloading and scripting process took no more than 30 minutes.”

Source : Someone hacked printers worldwide, urging people to subscribe to PewDiePie – The Verge