re: 76 million chase accounts hacked

quote:

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By the time JPMorgan first suspected the breach in late July, hackers had already “rooted,” or gained the highest level of privilege to, more than 90 computer servers, according to several people briefed on the results of the bank’s forensics investigation who were not allowed to discuss the breach publicly. It is still not clear how hackers managed to gain deep access to the bank’s computer network.

By the time the bank’s security team discovered the breach in late July, hackers had already gained the highest level of administrative privilege to more than 90 of the bank’s computer servers, according to several people briefed on the results of the bank’s forensics investigation who were not allowed to discuss it publicly.

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So I'm getting, from these two paragraphs, that they found out about it in july and it affected 90 servers.