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The message received by some Facebook users. - 

Facebook warned a number of users this week to change their passwords ASAP. But it's not the usual "update your password" request. The social network is reacting to continuing fallout from a massive hack that occurred last month. The original hack was of a large number of personal accounts for software made by the company Adobe. Investigative reporter Brian Krebs tells Marketplace Tech host Ben Johnson what happened.

Follow Ben Johnson at @@TheBrockJohnson