The police described the incident in the village of Stranocum as a paramilitary-style attack.
It happened at about 22:20 BST on Saturday night. Three men forced their way into a house and shot the victim.
This is despicable and should not happen in civilised society, said PSNI Insp Stephen McCafferty. He appealed for anyone with information to contact the police.
DUP MLA Mervyn Storey said there had been a worrying increase in these attacks and that he would be meeting with senior police “to discuss how they are going to deal with this upsurge”.
His party colleague, councillor John McAuley, said, no-one has the right to enter a property and inflict this sinister and warped form of justice on anyone.