Within a day - well before any legal or societal force could intervene - a superintelligence could make its way into every part of an organisation's internal network and tear it apart from the inside.

Conventional hackers are limited by the serial nature of their work - finding breaches, exploiting them, conducting further exploration of the network, trying not to get detected - in ways that a superintelligence would not be. The latter could be a hundred times as effective, a hundred times as fast, and a hundred times more parallel.

I agree that this is unlikely to happen because the societal bill would come due in time, but my point is that a month's lead is enough to do significant and lasting damage.