Found a couple of them in central europe on a zucchini plant (in august).
They are about a centimeter in size.
Tried looking for insect with orange back and 6 legs but no result.
[EDIT from comment]: The insect in this post looks pretty similar. There is a difference though - the one in my picture has orange legs not black ones. (maybe different stage of larvae or different species of ladybug or just random?)