What is the verb for "hacking" (as in computing) in Chinese?
黑 is the verb you are looking for.
被黑了 is the common phrase form of &quot;been hacked&quot;.
If you feel 黑 is too ambiguous you can add an object behind it to turn it into a VO (verb object) phrase: 黑电脑, etc.
Alternatively Oxford suggests:

5 COMPUTING, COLLOQUIAL
窃取
to hack secret data from computers
从计算机里窃取机密资料

Personally I would just go with 黑 in this day and age.