I usually refrain from posting “theoretical” OS X exploits since they rarely pose any real threat to Mac users. However, several sources are now reporting multiple Mac Trojan horses in the wild. These Trojans exploit a root vulnerability in Apple Remote Desktop Agent in Mac OS X 10.4 and 10.5.
This exploit has been rated as “critical”, but it does require that a user download and open the Trojan file.
Pay attention, folks. We knew that Macs would come more and more into hackers focus as market-share grew.
See more information at the SecureMac site.