The other day one of our people here (we won’t mention any names) mistakenly plugged a 19v power supply into a USB hub we have instead of the correct 5v power supply. As you can imagine, the results were not good. The error fried the major brand hub, as well as a major brand (expensive) keyboard connected to the hub.
Not affected at all was an Alfa AWUS051NH wireless USB adapter that was also connected to the hub. It continues to work great.