Security has long been a lottery - Probably most systems are exploitable, but the cost of developing such an exploit is expensive and the punishments for using such an exploit are large enough that it's not an everyday problem.
AI breaks both axes. Developing exploits is far more efficient using LLMs instead of humans, and LLMs don't (and can't) fear the reprisal and consequences the same way.
I do hope humanity will be able to mitigate these hacks, but we should expect them to continue and to become more severe on our present course.