Dixons Carphone (LON:DC) confirmed on Tuesday that details on as many as 10 million customers were accessed during a data breach in 2017, far higher than the 1.2 million originally announced.
The hack was discovered in June and has been under investigation since. Dixons Carphone said personal information, names, addresses and email addresses may have been accessed last year but no bank details were taken and it had found no evidence of fraud on customer accounts.
“While there is now evidence that some of this data may have left our systems, these records do not contain payment card or bank account details and there is no evidence that any fraud has resulted”, the company said.
The company reassured customers it had been working “around the clock” to improve its data security and that it was “very sorry for any distress” caused.
Dixons Carphone (LON:DC) shares have been unaffected by the breach, trading up 0.43 percent at 176.85 (1010GMT).