Slim CD, a company that provides software to merchants for processing electronic payments, said the credit card information of nearly 1.7 million people was exposed to an “unauthorized actor” in mid-June. The breached data potentially included “name, address, credit card number, and card expiration date,” but there is “no evidence that any such information has been used to commit identity theft or fraud,” the Florida-based company said in a notification letter filed September 6 with regulators.