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Lotte Group's mobile coupon service Giftiel was hacked, leaking personal information of 18,359 customers, as reported by Chosun Ilbo on October 25. The operator, Spoon, detected unauthorized external access at 7:16 PM on October 22 and temporarily suspended the service. Leaked data includes names, phone numbers, and bank account numbers for customers who applied for refunds, raising concerns about secondary financial fraud, according to Dong-A Ilbo. No financial damage from unauthorized coupon use has been confirmed so far. Korean media outlets like Yonhap and Maeil Business report the breach, with Maeil noting Giftiel issues vouchers for over 150 brands including Lotteria and Angel-in-us. Reactions from bloggers and café members are not covered in the supplied documents.