Netherlands - based tax and accounting firm Wolters Kluwer has suffered a malware attack , citing concerns about data on its cloud servers . Customers were unable to access the site ahead of a tax filing deadline for non - profit organisations on 15 . Wolters Kluwer provides services to most major banks and corporate finance companies along with all the top 100 US accounting firms . It did not reveal how many customers were affected but that the authorities had been informed and an investigation had begun .
Netherlands-based tax and accounting platform Wolters Kluwer has suffered a malware attack, raising concerns about data on its cloud servers. Customers were unable to access the site ahead of a tax filing deadline for non-profit organisations on 15 May. Wolters Kluwer provides services to most major banks and Fortune 500 companies along with all the top 100 US accounting firms. It did not say how many customers were affected but that the authorities had been informed and an investigation had begun.