Axle Broken 8Months after TÜV

We bought the vehicle 8 months ago with a fresh TÜV, today we had a breakdown and now we ask ourselves the question whether it is realistic that the car has such a rust damage 8 months after testing so that the wheel tears off me? Could the TÜV examiner have slept there or consciously overlooked something? He could have mentioned something at least in the report.