On June 20, 2026, my ISC2 CC exam session ended at 90 questions — with time still on the clock and no error message. ISC²'s own CAT documentation puts the minimum at 100 items. I'm a data analyst, so I did what I do when something terminates outside its expected parameters: I went looking for the data. Here's what turned out to be noise, and the one thing that didn't.

The domain I was most afraid of — Network Security — was the one I passed. The ones I felt confident in came back below proficiency. Here's what that taught me about how the ISC2 CC actually tests you.