A cyber attack has compromised Attack.Databreach the personal data of up to 26,000 Debenhams customers . The breach Attack.Databreach , which is understood to have been malware-based , targeted the online portal for the retailer 's florist arm , Debenhams Flowers . Debenhams has stressed that the site is operated by Ecomnova , a third-party supplier , and that customers of other services have not been affected . Ecomnova also operates Debenhams ' websites for hampers , personalised gifts and wines . While all four sites have been suspended , the retailer has not announced whether the others were also breached . Debenhams confirmed to Sky News that customer payment details , names and addresses were accessed or stolen Attack.Databreach during the attack Attack.Databreach . In a statement the company stressed that it was only the Ecomnova-run site that had been compromised Attack.Databreach , and that customers of its main website Debenhams.com `` can be confident they are unaffected by this attack '' . `` All affected customers have been contacted by Debenhams to inform them of the incident , '' the firm told Sky News . `` We are working with Ecomnova to ask the banks of those affected to block payment cards of those customers affected and issue customers with new cards . '' Debenhams said the incident had been reported to the Information Commissioner 's Office ( ICO ) , the UK 's independent body for upholding the Data Protection Act . Following a cyber attack in October 2015 , the ICO fined TalkTalk a record £400,000 after 15,656 individuals ' bank account details and sort codes were stolen Attack.Databreach . An ICO spokesperson said it was aware of the `` potential incident '' involving Debenhams Flowers and that enquiries were being made . `` Businesses and organisations are required under the Data Protection Act to keep people 's personal data safe and secure , '' the spokesperson said . Debenhams chief executive Sergio Bucher said : `` As soon as we were informed that there had been a cyber attack , we suspended the Debenhams Flowers website and commenced a full investigation . `` We are very sorry that customers have been affected by this incident and we are doing everything we can to provide advice to affected customers and reduce their risk . '' Ecomnova did not immediately respond to Sky News for comment .