Adobe Issues Update for Critical Zero-Day Acrobat and Reader Vulnerabilities
Adobe has issued updates for critical zero-day Acrobat and Reader vulnerabilities, which "could cause a crash and potentially allow an attacker to take control of the affected system." Adobe states that one of these vulnerabilities is already being exploited in the wild.
http://blog.intego.com/2011/04/22/adobe-issues-update-for-critical-zero-day-acrobat-and-reader-vulnerabilities/