Dow Jones & Co. discloses breach, incident likely related to Scottrade

On Friday, in a letter to customers, the CEO of Dow Jones & Co. disclosed a data breach affecting 3,500 people. Based on public details, the incident seems similar to a breach reported by Scottrade last week that impacted 4.6 million investors.

In his letter, Dow Jones Chief Executive William Lewis said that law enforcement officials informed the company about the potential breach in late July.

After bringing in outside help, an investigation turned up a confirmation that the systems housing the customer data was accessed – but there is no proof that data was exfiltrated. The investigators also determined that the attackers had access to the system between August 2012 and July 2015.

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