Back in the day, on my first day in a huge corporation famous for its refined engineering culture, I was issued a laptop that had some installation program running, to create a user for me, enroll on the corp network, etc. It had a bug, which made it run certain actions in an infinite loop.

I pressed Ctrl+C, and got a root shell. From it, I ran the enrollment scripts I could find; it gave me sufficient access to pull from the corporate repo. So I took a ticket, found a related bug in the code, and created a patch fixing it on the first day, technically by cracking into a corporate laptop. (I had to wait for a properly completed enrollment to be able to push the code.)