Verizon says security breach leads to customer data leak

Divesting: Verizon initially explored a sale of a larger portion of its enterprise business, including the former MCI assets, but could not reach an agreement with a buyer.

Verizon Communications Inc said an attacker had exploited a security vulnerability on its enterprise client portal to steal contact information of a number of customers. 

The company said the attacker however did not gain access to Customer Proprietary Network Information (CPNI) or other data.