Security vulnerability in Windows when viewing JPEG images. A serious security vulnerability has been found in Microsoft Windows that can be exploited by simply viewing a picture on your computer. This problem only affects JPEG images.
Because the vulnerability can be exploited simply by viewing an image, users should be cautious before clicking on any hyperlink - whether that hyperlink is in an Instant Message or an Aol Instant Messenger profile. We recommend that you not click on any link sent by IM or found in an AIM profile unless you know specifically where the link will lead you. Even if a link is sent to you from a friend, take the time to Instant Messenger them back and ask about the link before you click.
The vulnerability can be exploited in many programs that display JPEG images regardless of how you obtained those images. You must patch Windows and other vulnerable software to protect yourself. To patch Windows, click on the Start menu, located in the lower left corner of your screen, and click on the Windows Update menu item. Internet Explorer will start up and automatically take you to the Microsoft Windows update web site. Follow the instructions on that page to patch your operating system.
You will need to contact your other software vendors to determine if the software is affected by this vulnerability and if a patch is available.