Japanese telecommunications giant NTT Communications has confirmed suffering a cyberattack which saw it lose data on roughly 18,000 client organizations.
The data stolen includes contract numbers, customer contact names, telephone numbers, e-mail addresses, postal addresses, and information related to the use of services.
NTT has not disclosed the identity of the attackers or the method used to compromise its infrastructure.
NTT is taking measures to enhance security and monitoring systems to prevent future attacks.