Printers have long been the forgotten security weak points of most corporate networks, but this article specifically addresses a vulnerability that has been lurking in the print spool process for many years.  It has been recently addressed with a patch from Microsoft, but for those people still running Windows XP or other unsupported OS’s, the vulnerability remains quite real.

http://www.tripwire.com/state-of-security/featured/boobytrapped-printers-windows-malware/