EBay has come under fire over its handling of the cyberattack, in which hackers accessed personal data of all 145 million users, ranking it among the biggest such attacks launched on a corporation to date.

"For a very long period of time we did not believe that there was any eBay customer data compromised," global marketplaces chief Devin Wenig said, in the first comments by a top eBay executive since the e-commerce company disclosed the breach on Wednesday.