...This will lead to any information that has not been backed up being lost, but if you turn off the PC properly you couldtrigger a trojan attack. May says the important thing, whatever you decide to do, is to take down as much information as...
http://www.computerweekly.com/Articles/2003/05/06/194312/virtual-evidence.htm
...and steal data from PCs and servers. ISS said that by crafting an "ARJ file" for the Trend software an attacker couldtrigger a "heap overflow" within the Trend Micro Anti-virus Library. This would let them take control of systems. ISS...
http://www.computerweekly.com/Articles/2005/02/28/208608/in-brief.htm