Yes, since it fulfils the Bronstead-Lowry acid theory.
Bronstead-Lowry theory states that an acid is a proton (
If we look at the reaction of acetic acid with sodium hydroxide, it becomes clear that it is an acid.
As you can see, acetic acid has donated a proton to sodium hydroxide which accepted it. Thus, we can conclude that acetic acid is an acid and that sodium hydroxide is a base.