There are many types of euonymus, and not all of them are climbing vines....
David Beaulieu
Picture of climbing euonymus.
But the euonymus picture above shows two types of climbing euonymus, each climbing up the same tree. If you value a tree, don't let a climbing euonymus take hold on it: the vigorous euonymus vines will eventually cover so much of the tree's foliage as to impede photosynthesis.