Oracle has released an update to various Java versions to fix 20 security vulnerabilities. Java is one of the most heavily targeted applications by those using vulnerability exploits to install malware. Oracle is recommending that users install the Critical Patch Update as soon as possible. The patch is available through the program's built-in update feature and through the company's website.
http://www.oracle.com/technetwork/topics/security/javacpuoct2011-443431.html