As reported by concealment Rights Clearinghouse: department store string Sears Holding corp (SHLD.O) and Delta airwave Lines Inc (DAL.N) said on Wednesday some of their customer payment information may make been exposed in a cyber security hack at software service provider [ 24]7.ai.Department store chain Sears holding corp (SHLD.O) and Delta send Lines Inc (DAL.N) said on wednesday some of their customer defrayal information may have been exposed in a cyber certificate cut at software service provider [ 24]7.ai.A Delta aura Lines flight is pushed set of its gate at the airport in Salt Lake City, Utah, U.S., january 12, 2018. REUTERS/Mike BlakeSears said it was notified of the incident in mid-March and the incident led to unauthorized access to the citation card information of under 100,000 of its customers.Technology firm [ 24]7.ai, which provides online backing services for Delta, Sears and Kmart among other companies, found that a cyber security incident affected online customer payment information of its clients, it said.The incident happened on or after Sept. 26, 2017 last year and was found and resolved on Oct. 12, the company said.