The cyber attack exposed data of credit card users, including American Express cardholders.

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The breach affected over 121 million Amex cardholders worldwide, including nearly 1.5 million in India.

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American Express disclosed the breach to the Massachusetts State Attorney General's Office as a precautionary measure.

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The breach was caused by a point-of-sale attack at a merchant processor, affecting Amex Card member data.

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The company emphasizes the importance of protecting Card Members' information.

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Amex implements monitoring systems and internal safeguards, offering free fraud and account activity alerts.

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