Another Microsoft Word zero-day vulnerability has been discovered the fourth in two months.
The flaw can be exploited by hacker to execute arbitrary code on the compromised system. An attacker could exploit this vulernabilitiy by enciting a user to open a malicous word file which could be located on a remote system (URL) or in a mail as attachment.
More info on CVE-2007-0515
At the time of writing no vendor or third party patch has been released.
Do not open or save Word files that you receive from un-trusted sources or that you receive unexpectedly from trusted sources. This vulnerability could be exploited when a user opens a specially crafted Word file.