WikiLeaks on Tuesday released a significant cache of documents that it said came from a high-security network inside the Central Intelligence Agency. WikiLeaks called the documents Vault 7, and they lay out the capabilities of the agency's global covert hacking program. By the end of 2016, the C.I.A. program had 5,000 registered users, including government employees and contractors, [and] had produced more than a thousand hacking systems. The files have circulated among former United States government hackers and contractors in an unauthorized manner, one of whom provided WikiLeaks with portions of the archive," WikiLeaks said. The software targeted by the hacking program included the most popular smartphone operating systems. Apple's iPhone software ... was a particular target, including the development of several "zero day" exploits - a term for attacking coding flaws the company would not have known about. Google's Android ... received even more attention. By 2016, the C.I.A. had 24 weaponized Android "zero day" software programs. The C.I.A. also targeted ... internet-connected computers and home and industrial devices running the Linux operating system. In 2010, the Obama administration promised to disclose newly discovered vulnerabilities to companies like Apple, Google and Microsoft. But the WikiLeaks documents indicate that the agency found security flaws, kept them secret and then used them for surveillance and intelligence gathering.