SoftBank's IDC Frontier announced that the unauthorized access on the 7th of this month was caused by a vulnerability in its authentication system. Some websites operated for contracted municipalities and companies became inaccessible, but no leakage of stored data has been confirmed.
IDC Frontier, a SoftBank subsidiary, announced that it had determined the unauthorized access that occurred this month was caused by a vulnerability in software used for authentication systems, including login systems. The incident affected IDCF Cloud customers among municipalities and companies, with the websites of approximately 495 contracted customers becoming inaccessible and other impacts. Customer data has reportedly not been leaked externally.
IDC Frontier is working urgently to restore the systems of contracted customers and continues its response efforts to assess the scope of the impact and complete the recovery process. Further announcements are awaited regarding the situation going forward.