KDDI Data Breach Exposes Up to 14.2 Million Customer Accounts Across Six Japanese ISPs
KDDI Corporation, one of Japan’s largest telecommunications providers, disclosed a significant data breach on June 28, 2026, revealing that up to 14.22 million customer accounts may have been compromised. The breach, which also affected five partner internet service providers that rely on KDDI’s email infrastructure, exposed customer email addresses and passwords stored within the company’s … Read more