The default installation of Trend OfficeScan allows a non administrative user to disable the service due to weak permissions, stopping the Antivirus software from working. Versions 3.0 to 6.0 are affected.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/33271/trendofficeVirus.txt
Source: https://packetstormsecurity.com/files/33271/trendofficeVirus.txt.html