According to the article the system was developed by a regional subsidiary of a German mobile telco, which already tells you everything you need to know about its quality, but on top of that it was rushed to launch in time for some sporting event and thus even less testing was done that would normally happen.
Here's a better article: https://techcrunch.com/2017/07/25/hungarian-hacker-arrested-... - it seems like this was good faith security research (he disclosed the issue after testing it) and he couldn't use the transport pass he "stole" because he didn't even live in their service area anyway.
This arrest had nothing to do with stealing and all to do with putting well-connected, incompetent people in a very uncomfortable position.
Here's a better article: https://techcrunch.com/2017/07/25/hungarian-hacker-arrested-... - it seems like this was good faith security research (he disclosed the issue after testing it) and he couldn't use the transport pass he "stole" because he didn't even live in their service area anyway.
This arrest had nothing to do with stealing and all to do with putting well-connected, incompetent people in a very uncomfortable position.