Capital One Warns of More Data Leaked in 2019 Breach May 5, 2021 @prajeetspeaks) • April 5, 2021 Get Permission Capital One is warning additional customers that their Social Security numbers may have been exposed in a massive 2019 breach. Meanwhile, a suspect in the breach is slated to go to trial in October, according to court documents. In a recent breach notification and a letter sent to customers, Capital One notes that following an additional internal investigation into the 2019 breach that included the theft of 106 million credit card records and personal data belonging to customers in the U.S. and Canada, the bank found that additional Social Security numbers may have been exposed.