Oracle has released Java 7 Update 51 on January 14 2014 . The Oracle blog post about the release of Java 7 Update 51 mentions this version contains security fixes for various vulnerabilities.
So, if you’re using Java, you should probably update. ASAP.
You can download Java at http://www.java.com/en/download/index.jsp or if you want to manually download Java for Windows, Mac, Linux, see
If you have older versions of Java, you should remove them as soon as possible. The http://www.java.com/en/download/faq/remove_olderversions.xml page has more information and tools on how to remove older versions of Java.
As a additional security precaution, you can disable the execution of Java content in your browser.