The law is mostly on the side of the consumer here though - the real risk is low - if anything it might be harder to get credit in the short term for a while.
What "sensitive financial data"?
Card numbers.
> In addition, credit card numbers for approximately 209,000 consumers and certain dispute documents, which included personal identifying information, for approximately 182,000 consumers were accessed.
That's not "half of U.S. adults" as the OP stated.