Edward Snowden is making explosive claims about some of the information revealed in the latest Wikileaks hack.

'Still working through the publication, but what @Wikileaks has here is genuinely a big deal. Looks authentic,' wrote Snowden on Twitter on Tuesday afternoon.

He then added that the program and office names that were revealed in the hack, code-named Vault 7, are real and would only be known by an insider.

That is when he explained just why this latest hack was such a big deal, writing: 'If you're writing about the CIA/ @Wikileaks story, here's the big deal: first public evidence USG secretly paying to keep US software.'

He followed that up by tweeting: 'The CIA reports show the USG developing vulnerabilities in US products, then intentionally keeping the holes open. Reckless beyond words.'

Snowden closed out by writing: 'Why is this dangerous? Because until closed, any hacker can use the security hole the CIA left open to break into any iPhone in the world.'

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Weighing in: Edward Snowden (above) said on Twitter on Tuesday that the Wikileaks hack of the CIA 'looks authentic'

Snowden was then back at it offering up his opinions about the findings later in the day, linking to one report and writing: 'Evidence mounts showing CIA & FBI knew about catastrophic weaknesses in the most-used smartphones in America, but kept them open -- to spy.'

Wikileaks released documents on Tuesday that they claim offered proof that the CIA was capable of hacking the devices of millions of Americans.

Thousands of documents which were purportedly taken from the CIA's Center for Cyber Intelligence were published online.

Wikileaks claimed that the documents came from 'an isolated, high-security network situated inside the CIA's Center for Cyber Intelligence in Langley, Virginia.'

They did not however reveal if the documents were obtained through a hack or handed over to them by an employee with the agency.

Jonathan Liu, a spokesman for the CIA, said: 'We do not comment on the authenticity or content of purported intelligence documents.'

'Recently, the CIA lost control of the majority of its hacking arsenal including malware, viruses, trojans, weaponized 'zero day' exploits, malware remote control systems and associated documentation,' stated Wikileaks in a press release.

'This extraordinary collection, which amounts to more than several hundred million lines of code, gives its possessor the entire hacking capacity of the CIA.

'The archive appears to have been circulated among former U.S. government hackers and contractors in an unauthorized manner, one of whom has provided WikiLeaks with portions of the archive .'

Julian Assange said in a statement: 'There is an extreme proliferation risk in the development of cyber 'weapons'. Comparisons can be drawn between the uncontrolled proliferation of such 'weapons', which results from the inability to contain them combined with their high market value, and the global arms trade.

'But the significance of 'Year Zero' goes well beyond the choice between cyberwar and cyberpeace. The disclosure is also exceptional from a political, legal and forensic perspective.'

Proud: Julian Assange (above with Amal Clooney in 2011) said this latest release was 'exceptional from a political, legal and forensic perspective'

Assange and Wikileaks have been teasing this hack for the past month, and if it is indeed authentic as Snowden suggests, it is another devastating blow for the US government.

Wikileaks has previously released classified documents from the State Department and the Pentagon.

The group said they plan to release more CIA documents as well in the near future.

The documents released on Tuesday cover a host of topics, including what appears to be discussions on how to compromise Samsung smart televisions and turn them into surveillance devices that can unknowingly record individuals.

The data also includes details on CIA efforts to subvert American software products and smartphones, including Apple’s iPhone, Google’s Android and Microsoft Windows - just like Snowden claimed on Twitter.

All these devices are reportedly being turned into open microphones on which the CIA is able to listen in on people.

Wikileaks also claim that the files show that the US Consulate in Frankfurt, Germany is a covert base for hackers covering Europe and the Middle East.

'The CIA also runs a very substantial effort to infect and control Microsoft Windows users with its malware,' claims Wikileaks as well after viewing the documents.

Vault 7 was obtained recently and covers documents which were obtained through 2016. It is the largest intelligence publication in history.