Nice article that goes on about how embedded systems are usually ignored for updates and security audits/patches. Unfortunately this has been a problem for over a decade where everything from a router to a printer is installed, then forgotten (til its hacked). And many of these devices outlast the computer systems (that are usually leased) in an office.
http://isc.sans.edu/diary/Silent+Traitors+-+Embedded+Devices+in+your+Datacenter/15277