cyberhack

Every user who had a Yahoo account in August 2013 was likely affected by its massive hack, the company's parent, Verizon, said Tuesday.

This latest disclosure triples the number of accounts compromised by the major 2013 data breach that the company disclosed late last year. At the time, Yahoo said hackers had stolen data associated with 1 billion user accounts; the new disclosure escalates that number to 3 billion.

The Securities and Exchange Commission says cybercriminals got into the agency's files last year and accessed information that might have been used to give them a secret edge in trading.

The SEC says it had known about the intrusion in 2016 into its Edgar filing system, but learned this month that "nonpublic information" accessed may have been used for "illicit gain."

After the revelation that a cybersecurity breach at the international credit reporting agency Equifax exposed personal information of 143 million people, the company has confirmed an additional security incident with a payroll-related service in the months prior. It says the two are unrelated.

Updated at 7:00 p.m. ET

Yahoo says hackers stole names, email addresses, phone numbers, dates of birth and encrypted or unencrypted security questions and answers from more than 1 billion accounts.

In a statement posted to its website on Wednesday, the company said it had "taken steps to secure user accounts and is working closely with law enforcement."

The statement continued: