CIA said it first became aware of the leak late last year
Reuters spoke to CIA officials who said the Wikileaks documents were legitimate and are focusing on CIA contractors as the likely source. As Wikileaks detailed in yesterday's release, the information and programs were classified because that would have hindered their use.
Wikileaks today said the first release was less than 1% of what it had received. Expect them to publish more in the weeks ahead, including damaging information on how the CIA used the programs and what they obtained.
Wikileaks has already revealed the Angela Merkel's cellphone was bugged and that the CIA spied on 2012 French election candidates.