But here is something different, US Navy were caught red handed by Electronic Frontier Foundation (EFF), while trying to buy Zero-Days exploits for number of popular software's.
The Electronic Frontier Foundation (EFF) has spotted the US Navy publicly soliciting people to sell security vulnerabilities to well-known software. It seems that the US Navy was also buying the Zero-days as NSA, to build backdoors into the software
“the US government needs to have access to vulnerability intelligence, exploit reports and operational exploit binaries affecting widely used and relied upon commercial software”.EFF preserved the post which mentions that the US Navy wanted to buy Zero-days in various software packages belonging to Microsoft, Adobe, Android, IBM, Apple, EMC, Cisco, Linksys, Linux, EMC and Java. The PDF grab is given below :