Celastrus.

And based on my experience in New England, it is most likely the Asian invasive type o d bittersweet/Celastrus. I have yet to see a native specimen. Flowers and berries are differently located between the two, with the native have them only at stem ends and the Asian type having them in the leaf axils up and down the stem, though not necessarily in every leaf axil. Birds eat the berries and deposit seeds wherever they fly, so they spread rampantly.

Adding that pliers help with removal.

Of teeth in particular.