Cybercrime organization Lapsus$ posted suspicious screenshots. Microsoft officials said they are "aware of the claims and are investigating."

A German university student show how to execute code on a Samsung Galaxy S10e.

It just takes $2,000 and a 3-D printer to get started, they say.

Both companies fixed the issues in July.

The episodes highlight how, just like any other technology, biometrics software needs to be rigorously tested for bugs.

The competition exposed bugs in mobile devices made by Apple, Samsung and Xiaomi. Hackers went home with thousands of dollars and some sweet jackets.