Meme Vault 7 is the vault where the FBI keeps their top secret meme files. These files detail the CIA's plot to control the memes in an attempt to wage war against Kek.
Luckily, these documents were exposed by Kekileaks (formerly Wikileaks until they merged with). With the knowledge of keksploits revealed to the Kekistanis, the CIA was forced to cease their meme containment program.
The files also contained some evidence of collusion with Cuckistan, though nothing has been solidly proven as of yet.