A KDDI data breach has put up to 14.2 million ISP email logins at risk across Japan

James Whitmore reports: Data breach at Japanese telecoms operator KDDI may have exposed up to 14.22 million email addresses and passwords linked to ISP mail services, after attackers gained unauthorised access to a system used by six providers in Japan. KDDI said it confirmed the incident on 17 June 2026, repaired the affected system the same day,... Source