Hacking of a new kind? A hacker named ‘StackOverflowin’ hijacked more than 150,000 printers around the globe in order to warn users about a critical vulnerability.

Over the weekend, a hacker took over thousands of printing devices. Unlike other hacks which have purpose of stealing information, this hack was done in good faith.

The hacker, who identified himself as StackOverflowin, printed a warning for the internet-connected users who were using their printing devices without any firewall protection. He claimed that he targeted the printing devices that have IPP ports, LPD ports, and port 9100 left open to external connections.

Hacker left two different messages; the first one showed ASCII art on a robot while the other showed an ASCII art with a computer.

“stackoverflowin/stack the almighty, hacker god has returned to his throne, as the greatest memegod. Your printer is a part of flaming botnet. YOUR PRINTER HAS BEEN PWND’D.”

“stackoverflowin the hacker god has returned, / your printer is part of a flaming botnet, / operating on Putin’s forehead utilising BTI’s (break the internet) complex infrastructure…
hacked / hacked / lol just, / kidding
For the love of God, please close this port, skid.

Also read: Beware of this Twitter Verification Phishing Scam

He even mentioned his twitter handle @lmaostack for any questions.

Even though people seemed to have been enjoying the hack, the printers’ making companies seriously need to address their users about the use of firewalls.