Hackers are always on the lookout for ways into systems they can exploit readily and easily. It seems that one such weakness exists in the old Java 6 software, which is no longer supported unless users have a contract with Oracle.
Java 7 saw the bug fixed, but users who are still using Java 6 could be at significant risk and there is no update available to repair the bug.
The exploited weakness exists in the Java Runtime Environment’s 2D sub-component. This weakness can leave users vulnerable to remote attacks that will allow hackers access without permission.
According to Qualys, a security company, around half of Java users are still using Java 6. This means that the level of vulnerability is high and there is a good chance that your systems are at risk.
Thankfully there is a very simple solution and upgrading to Java 7 will protect you from attack.