Another PowerPoint bug threatens

Microsoft is investigating a report of a new, yet-to-be-fixed security vulnerability in PowerPoint, CNET reports.
Sample attack code that exploits the vulnerability has already been released on the Internet. Use of the code in an attack could cause a complete system compromise, according to Microsoft.
“The reported proof of concept may allow an attacker to execute code on a user’s machine by convincing them to open a specially crafted PowerPoint file,” said a Microsoft spokesperson. “We are not aware of any attacks attempting to use the reported vulnerability.”
The flaw affects PowerPoint 2003. Security monitoring companies Secunia and the French Security Incident Response Team, or FrSIRT, also list earlier versions as vulnerable. FrSIRT deems the issue “critical,” while Secunia rates it “highly critical.”
For protection, people should not open Office documents received from untrustworthy sources, FrSIRT advices.