PowerPoint Users Vulnerable to Trojan Attacks
Although Microsoft hasn't yet released a patch for this flaw, there are some things you can do to avoid trouble. First, be wary of e-mails with .ppt attachments from people that you don't know; it's always a good idea to be careful with any file coming from an unknown source. Similarly, be cautious around messages that look like they've been forwarded, even if it's from a friend or family member.
The vulnerability affects Microsoft Office's PowerPoint 2000, 2002, and 2003, and Power Point for Mac 2004. The attack is said to be "limited and targeted," which is probably supposed to be some sort of assurance, but the lack of a patch isn't too assuring to us.
So, if some random person sends you a presentation that promises to contain great things, you'll hopefully know what to do; don't open it. Just sit tight with the rest of us and wait for the patch. [From: Threatpost and Microsoft Malware Protection Center]