Two pics. Whatever it is, it realy wants to take over with a vengeance.
Central South Carolina, taken in the last couple of days.
From the look of the fruits, I would say some species of Eleagnus.
Unless you want it covering everything you own that doesn’t move, you’ll want to follow it back to the base of the plant and remove it root and all. Once these things get established it can be very difficult to remove them completely.