The Adobe Acrobat Reader contains a vulnerability that may allow an attacker to execute arbitrary code.
Adobe Acrobat Reader is software designed to view Portable Document Format (PDF) files. Adobe also distributes the Adobe Acrobat Plug-In to allow users to view PDF files inside of a web browser.
Per iDefense Advisory 02.08.08:
By convincing a user to open a malicious PDF file, a remote, unauthenticated attacker may be able to execute arbitrary code. This can happen in several ways, such as opening an email attachment or viewing a web page.