Delta now says that payment-card information for about “several hundred thousand” airline customers may have been exposed by a malware breach last fall that also hit Sears and other companies.
The airline says that the malware attack may have exposed customers’ names, addresses, credit card numbers, card security codes and expiration dates.
Delta Air Lines Inc. offered the additional details about the attack on Thursday, a day after saying that only a “small subset” of customers was affected.
The Atlanta-based airline said that it wasn’t sure whether customers’ information was actually compromised by malware that it believes was in software used by (24)7.ai, which provided the airline with online chat services for customers, for about two weeks. The software company said it discovered and fixed the breach in October.
Sears said in a statement that it believes the malware led to “unauthorized access to less than 100,000 of our customers’ credit card information.”