A study conducted by Recorded Future on PoC exploits shared online over the last year shows that social media is the main distribution channel. Security experts at the threat intelligence firm Recorded Future have conducted an interesting study on the proof-of-concept exploits. The research allowed the discovery of roughly 12,000 references to POC exploits since March 22, 2015. The products being targeted are Android phones, Microsoft Windows 7 and 8, Microsoft Internet Explorer, Linux, GNU C Library (glibc), and Firefox. Most targeted technologies are Android (35,8), DNS (23,2), and SSH (20,3)”]
Source: https://securityaffairs.co/wordpress/47150/hacking/poc-exploits-study.html