The Arkoon Network Security StormShield security suite proactively blocks the latest Adobe Reader vulnerability (without any product updates).  This vulnerability was quickly and actively exploited by attackers before the software provider even knew about the problem.

The threat was unknown. There were no antiviral products capable of blocking it. The entire world was open to potential victimization, even with up-to-date antivirus software.

When writing this news, the vulnerability is not patched by Microsoft, but customers who use StormShield are protected.

More : http://blogs.technet.com/b/msrc/archive/2013/05/03/microsoft-releases-security-advisory-2847140.aspx