TfL cyber attack: Thousands of passengers feared to have bank details exposed in massive hackTfL cyber attack: Thousands of passengers feared to have bank details exposed in massive hack

The cyber attack that hit Transport for London a week ago is much worse than first thought, TfL admitted on Thursday afternoon as it was revealed a teenager has been arrested in connection with the hack.Names and phone numbers of passengers are thought to have been obtained, including some personal data from Oyster cards and Contactless bank cards used to make journeys on the capital’s public transport network.The hack is understood to have potentially exposed the bank account details of about 5,000 passengers - either via activity on their Oyster card account or refund data. This includes account numbers and sort codes.In addition, an unknown number of passengers who had signed up to TfL email alerts – for example, for regular email bulletins on the Elizabeth line or a particular Tube line – are thought to have had their name, home address or email account exposed.