If you're one of the 1700+ banks or credit unions currently using Fiserv, or are a customer of one, a flaw in the company's web platform may have exposed your personal and financial information to the masses. The flaw was fist recognized by Kristian Erik Hermansen, when he received an email alert indicating a new transaction had posted to his own bank account. Noticing the alert was assigned with a specific "event number", Hermansen hypothesized the event numbers for similar