At about the same time, ZDNet also reported that the Flashback botnet, which it claims had infected over 600,000 Macs in 2012, was still in existence, albeit with a much-reduced number of infected machines (22,000). It can infect Windows, Linux and Mac OS X computers running the affected Java versions. In January 2014, ZDNet and other sourcres reported the existence of cross-platform botnet software that installs by exploiting a vulnerability in Java SE 7 Update 21 and earlier.
