You are correct. But it must be qualified that ALL salvation comes from Christ whether He was personally known or not.
From the Catechism of the Catholic Church:
"Outside the Church there is no salvation"
846 How are we to understand this affirmation, often repeated by the Church Fathers?335 Re-formulated positively, it means that all salvation comes from Christ the Head through the Church which is his Body:
847 This affirmation is not aimed at those who, through no fault of their own, do not know Christ and his Church:
848 "Although in ways known to himself God can lead those who, through no fault of their own, are ignorant of the Gospel, to that faith without which it is impossible to please him, the Church still has the obligation and also the sacred right to evangelize all men."338
335 Cf. Cyprian, Ep. 73.21:PL 3,1169; De unit.:PL 4,509-536.
336 LG 14; cf. Mk 16:16; Jn 3:5.
337 LG 16; cf. DS 3866-3872.
338 AG 7; cf. Heb 11:6; 1 Cor 9:16.
Agreed! I didn't doubt that was the case for the Catholic faith. Thanks for the response.