MS07-054 is not categorized as virus, worm, Trojan or backdoor. It is an important vulnerability in certain versions of MSN Messenger and Windows Live Messenger, which allows arbitrary code to be remotely executed in the vulnerable computer.
The affected versions are:Windows Live Messenger 8.0, MSN Messenger 7.5, MSN Messenger 7.0 and MSN Messenger 6.2.
If exploited successfully, MS07-054 allows hackers to gain remote control of the affected computer with the same privileges as the logged on user. If this user had administrator rights, the hacker could take complete control of the system: create, modify or delete files, install programs, create new user accounts, etc.
This vulnerability can be exploited by sending an invitation to a user to join in a specially crafted webcam or video chat invitation.
If you have any of the vulnerable components mentioned above, it is recommended to download and apply the security patch for this vulnerability. Click here to access the web page for downloading the patch.