The actual goal scorer couldn't, so if Mbuemo had scored it would have been overruled. But they removed the accidental handball in the build up to a goal a couple of years ago.
TBH, I can see why they called it accidental, however 90% of handballs are accidental so almost all handballs shouldn't be given as penalties under those rules used today. Should still have been overturned as the amount of control because of it directly led to the goal.