Fiserv Flaw Exposed Customer Data at Hundreds of Banks

Fiserv is a large financial processor for many financial institutions and holds a thirty seven percent share of the bank core processing market. They recently suffered from an exploit that allowed users to edit a single number within website code and see personal details, account numbers and adjust notification settings of other bank users. The exploit has been patched and the patch has been distributed to clients of Fiserv and it is critical for any customers of Fiserv that they update immediately to ensure the patch is applied.


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