I am unaware of this topic being "disallowed," or being a "hot button," topic but I am inclined to say yes, I do believe in this.
"The most Holy Roman Church firmly believes, professes and preaches that none of those existing outside the Catholic Church, not only pagans, but also Jews and heretics and schismatics, can have a share in life eternal; but that they will go into the "eternal fire which was prepared for the devil and his angels" (Matthew 25:41), unless before death they are joined with Her; and that so important is the unity of this ecclesiastical body that only those remaining within this unity can profit by the sacraments of the Church unto salvation, and they alone can receive an eternal recompense for their fasts, their almsgivings, their other works of Christian piety and the duties of a Christian soldier. No one, let his almsgiving be as great as it may, no one, even if he pour out his blood for the Name of Christ, can be saved, unless he remain within the bosom and the unity of the Catholic Church."-Pope Eugene IV.
"It is clear that this Roman Church is to all churches throughout the world as the head is to the members, and that whoever separates himself from it becomes an exile from the Christian religion, since he ceases to belong to its fellowship."-Pope Boniface I.
"Now the holy Church universal proclaims that God cannot be truly worshipped saving within herself, asserting that all they that are without her shall never be saved."-St. Gregory the Great.
"I believe that in Baptism all sins are forgiven, that one which was committed originally as much as those which are voluntarily committed, and I profess that outside the Catholic Church no one is saved."-Pope Sylvester II.
Admittedly, I am no scholar but, as previously stated, I am inclined to believe this.
Edit: I am ready to dive head first into this and again, I am unaware of VCII possibly disagreeing with the doctrine.