Giant centre back Ngadeu-Ngadjui sneaked around the back of the Ghana defence from a free kick and took advantage of a mix-up to blast the ball home from close range in the 72nd minute.
Bassogog caught Ghana on the counter attack as Cameroon added a second with virtually the last kick of the game to claim a place in Sunday’s final against Egypt in Libreville.
Cameroon, who were beset by selection problems before the start of the tournament, profited from poor finishing by their more fancied opponents, who were making a sixth successive semi-final appearance, but are still without success since 1982.
