Personal details of less than 400,000 U.K residents may also have been accessed by hackers, said Equifax.
In another starling disclosure Equifax Inc stated, the personal details of nearly 100,000 Canadians were exposed in the massive hacking incident that took the company by storm earlier this month.
As per Equifax, hackers were able to access the personal information of 100,000 Canadians, including names, addresses, social insurance numbers and in some cases even credit card details.
It was the first estimate of Canadian exposure to the hacking incident which Equifax provided since its disclosure of the attack which exposed not only 143 million U.S. consumers but Canadian and UK residents as well.
Lisa Nelson, the president and general manager of Equifax Canada, has apologized to all those who have been affected by the security incident and while acknowledging frustration stemming from the lack of clarity; she said Equifax will write to them with measures they should now take.
Last week, Equifax said, it will be contacting fewer than 400,000 British consumers whose personal information may have been accessed in the hack.