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You have got to be KDDI-ng – Japanese telco exposes 14.2 million managed email credentials

ID: fc9311e9-5b93-5c2d-b314-c0f4c6e70573

STIX ID: report--fc9311e9-5b93-5c2d-b314-c0f4c6e70573

Feed Name: The Register (Security)

Threat Score
75/100

Date Published: 2026-06-24

Date Updated: 2026-06-24

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Japanese telecom KDDI detected unauthorized access to a managed email service on June 17 that may have exposed up to 14.2 million email addresses and passwords for KDDI and several partner ISPs; KDDI says it contained the intrusion the same day, informed authorities, and that stored passwords were hashed/encrypted while the investigation continues.

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