- Oct 12, 2009
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Visa, MasterCard warn of 'massive' security breach, report says.
Visa and MasterCard warned banks of a potential breach at a US-based credit card processor, the Krebs on Security blog reported Friday. "Sources in the financial sector are calling the breach 'massive' and say it may involve more than 10 million compromised card numbers," Krebs wrote.
Alerts were sent out to US banks late last week advising them that certain cards may have been compromised. The affected US banks reportedly are analyzing data transactions in a bid to track a common point of purchase.
The breach was believed to have occurred between Jan. 21 and Feb. 25.