MasterCard and Visa have apparently suffered a serious processor breach. Sources in the financial sector are calling the breach massive, and say it may involve more than 10 million compromised card numbers. A total of 56,455 member VISA and MasterCard accounts were compromised, a provider of online financial services to credit unions said on Wednesday, PSCU said it alerted 482 credit unions that appear to have had cards impacted by the breach. The information could be used to counterfeit new cards.”]