The latest updated Java SE 7 update that was released on August 30, 2012 has detected critical Malware bug to give attackers complete control of your computers. Adam Gowdiak, the CEO of Poland wrote in an e-mail to Ars and said they’ve uncovered a flaw in the Java 7 update released by Oracle on Thursday that allows attackers to take complete control of end-user computers. His team developed proof-of-concept code and delivered it on Friday to Oracle engineers.
Oracle has yet to explain the delay in fixing the bugs. So Java has become unsecured and better way to avoid the update your PC to Latest Java SE 7 Update . Wait until java team announced bug fix or released newer update for your PC.