Macromedia flash player vulnerability
A severe security vulnerability has been found in versions of the Flash Player prior to 7.0.19.0 Many sites require flash player in order to view various features on the site (depending on the site this ranges from commercials to the site navigation.) A specially crafted swf file on a remote website could allow the attacker to run arbitrary code (anything they want) on the local machine. In other words this could be an avenue for viral/spyware infection or trojan activity.
Due to the potential risk and the WIDESPREAD install base of Flash player it’s important to get the word out to everyone to update their player as soon as possible.
Update link
Advisory details
Find out which version you have at this site.
Security fix coverage as well..