Former Yahoo Chief Executive Marissa Mayer apologized on Wednesday for a pair of massive data breaches at the internet company, blaming Russian agents, at a hearing on the growing number of cyber attacks involving major U.S. companies.
"As CEO, these thefts occurred during my tenure, and I want to sincerely apologize to each and every one of our users," she told the Senate Commerce Committee, testifying alongside the interim and former CEOs of Equifax Inc and a senior Verizon Communications Inc executive.
Verizon, the largest U.S. wireless operator, acquired most of Yahoo Inc's assets in June, the same month Mayer stepped down. Verizon disclosed last month that a 2013 Yahoo data breach affected all 3 billion of its accounts, compared with an estimate of more than 1 billion disclosed in December.
In March, federal prosecutors charged two Russian intelligence agents and two hackers with masterminding a 2014 theft of 500 million Yahoo accounts, the first time the U.S. government has criminally charged Russian spies for cyber crimes.