Cybersecurity

JPMorgan Hack Said to Span Months Via Multiple Flaws

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Hackers burrowed into the databanks of JPMorgan Chase & Co. and deftly dodged one of the world’s largest arrays of sophisticated detection systems for months.

The attack, an outline of which was provided by two people familiar with the firm’s investigation, started in June at the digital equivalent of JPMorgan’s front door, exploiting an overlooked flaw in one of the bank’s websites. From there, it quickly developed into any security team’s worst nightmare.