Comcast customers are being told to reset their password and account information after the company discovered that information was being sold online.
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About 200,000 customers could be affected, Comcast said.
The stolen information did not come from a data breach, but was taken during previous malware attacks, phishing scams and other third party attacks.
In this Feb. 15, 2011 file photo, a Comcast logo is displayed on an installation truck in Pittsburgh. (AP Photo/Gene J. Puskar, file)