Your printer can harm you...

[liqnit]

Printers contains CPU and are used in attackes on other computer.
Printer that connected to network usually in firms can used to launch an attack on other computers.
read on..
http://www.aoaforums.com/frontpage/content/view/668/

[Schwarz]

Whoa this could make some nice DDOS attacks...

[liqnit]

according to some forums it has allready been used in DDOS attacks and because the those network printers are always on and use Linux usually they are not being suspectd as zombies
and can continue the attacks