An as yet unnamed marketing vendor used by AT&T has exposed data associated with nearly 9 million wireless telecom accounts. The breach data did not contain payment information, account passwords, social security numbers or other PII says AT&T spokesperson. "We recently determined that an unauthorized person breached a vendor's system and gained access to your Customer Proprietary Network Information (CPNI)," the data breach notification letter in the AT&T community forum read. "In our industry, CPNI is information related to the telecommunications services you purchase from us, such as the number of lines on your account or the wireless plan to which you are subscribed." It added, " We have notified federal law enforcement about the unauthorized access of your CPNI as required by the Federal Communications Commission. Our report to law enforcement does not contain specific information about your account, only that the unauthorized access occurred."
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