n. Secret information, especially of a military or political nature, obtained by breaking into a computer system.

Hacking Intelligence — information that has been obtained by hacking into a computer system and used for military purposes.
—“Web speak,” The Daily Telegraph, October 25, 2001
2001 (earliest)
According to a US presidential commission, the global population with the computer skills required for Hackint operations and other forms of cyber-attack against important Western targets has grown from a few thousand 20 years ago to about 19 million today.
—Christopher Andrew, “Counsel of war,” The Times of London, October 04, 2001
With the collapse of the Soviet Union, we can now walk into the Kremlin and ask President Yeltsin's aides if they lost any warheads today. The answer one gets is mockingly called ASKINT within the intelligence community.
—“The Ints and Outs of Intelligence,” Government Executive, July 01, 1996