Even though the breach didn't affect the company's United Kingdom business, it has still managed to compromise the personal information of a number of its British consumers.
CREDIT monitoring company Equifax has admitted nearly 700,000 United Kingdom consumers had personal information accessed in a cyber attack.
The company said in a statement that 15.2 million records - some dating back to 2011 - were stolen in the data breach.
As a credit reporting agency, Equifax keeps vast amounts of consumer data for banks and other creditors to use to determine the chances of their customers' defaulting. It added that stolen data also included credit card details of 15,000 customers.
Overall, around 145.5 million people, mostly in the United States, had their information compromised, including Social Security numbers, birth dates and addresses.
The survey, sponsored by CyberScout, also found that more than 49 percent of respondents were confused about what to do after receiving a breach notification.
The company said it has now started notifying impacted United Kingdom consumers.
Patricio Remon, Equifax's president for Europe, said: "Once again, I would like to extend my most honest apologies to anyone who has been concerned about or impacted by this criminal act".
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Britain's National Cyber Security Centre (NCSC) released a separate statement on the latest disclosure, warning British consumers that they could be targeted by phishing attacks if their information was compromised in the breach.
"NCSC advises that passwords are not re-used on any accounts if you have been told by Equifax that any portion of your membership details have been accessed".