Over 360,083 credit card accounts in North America of Citigroup were affected as a result of a compromise of its card account management website in May. Citigroup first disclosed publicly the compromise of Citi Account Online last week, when it said that about 210,000 accounts had been affected. The bank said it has implemented “enhanced procedures” to prevent a recurrence of an event of this type of event. Data that is critical to commit fraud, such as the customers’ social security number, date of birth, card expiration date and card security code (CVV) was not compromised.”]
Source: https://www.csoonline.com/article/2128800/citigroup-reveals-breach-affected-over-360-000-cards.html