The whistleblower website published thousands of pages describing sophisticated software tools and techniques employed by the agency to break into smartphones, computers and Internet-connected televisions.
The documents include instructions for compromising a broad range of standard computer tools that are used for spying such as Skype, Wi-Fi networks, documents in PDF format, and commercial antivirus programs that are employed by millions of people to protect their computers.
According to the documents, a program called Wrecking Crew explains to crash a targeted computer. Another program provides detailed instructions on how to steal passwords using the autocomplete function on Internet Explorer.
The document release is the latest coup for the website.
It's dangerous for the CIA spy agency, which uses its hacking abilities to carry out covert spying on against foreign organizations.
The release included 7,818 web pages with 943 attachments, many of them partly redacted by the website's editors to avoid disclosing the actual code for cyber weapons.
The group said that the entire archive of CIA material contains several hundred millions of computer code.
WikiLeaks said the CIA and allied intelligence services have managed to compromise both Apple and Android smartphones, allowing their agents to bypass the encryption on traditional services such as WhatsApp and Telegram.
The website said that government hackers are now able to penetrate smartphones and collect "audio and message traffic before encryption is applied."
"If this is true, it says the NSA isn't the only one with and advanced, persistent problem with with operational security for these tools," said Robert. M. Chesney, a specialist in national security law at the University of Texas at Austin.
There was no public confirmation of the authenticity of the released documents.