Microsoft Security Advisory MS01-012 - Outlook and Outlook Express can be tricked into executing arbitrary code via email messages which contain malformed vCards. When the vCard is opened, a buffer overflow error can cause Outlook to crash, or take any desired action, limited only by the permissions of the recipient on the machine. Microsoft FAQ on this issue available here.
Microsoft Security Advisory MS01-012 - Outlook and Outlook Express can be tricked into executing arbitrary code via email messages which contain malformed vCards. When the vCard is opened, a buffer overflow error can cause Outlook to crash, or take any desired action, limited only by the permissions of the recipient on the machine. Microsoft FAQ on this issue available here.