The pace of innovation precludes building everything from scratch, resulting in 80-90% of a modern application consisting of open source components. This translates to global downloads of open source components in the tens of billions. Cybersecurity Ventures predicted that the cybercrime "industry” will exceed $6 trillion by 2021, making it more profitable than global drug cartels. We are no longer dealing with script kiddies attacking our applications --, this is a big, profitable business backed by advanced adversaries. Since then, we’ve seen ShellShock, HeartBleed, Commons Collections and others all following the pattern of widespread exploit post-disclosure as opposed to preceding it.

Source: Forbes May 11, 2018 11:26 UTC