" Java was responsible for 50% of all cyberattacks last year in which hackers broke into computers by exploiting software bugs, according to Kaspersky. That was followed by Adobe Reader, which was involved in 28% of all incidents. Microsoft Windows and Internet Explorer were involved in about 3% of incidents, according to the survey. "In January, 2013, the US Department of Homeland Security issued a warning recommending that Java be disabled in web browsers. For a few days at the end of January, 2013, Apple blocked the use of java in web browsers on Mac computers worldwide. This was a major inconvenience to some, but clearly Apple felt the security risks were quite serious. Oracle, the company providing Java, subsequently fixed some of the vulnerabilities in Java (and Apple re-enabled Java on Macs), but most likely other security risks remain.