Cleus/Blog
ArticlesTry Cleus free

The Cleus Blog

Tutorials, engineering deep-dives, and product updates on building with AI agents — research, coding, images, video and voice.

AllEngineeringAI NewsCase Studies

Tagged #kddi hack · clear

KDDI Data Breach Explained: How a Zero-Day Exposed 12 Million ISP Email Accounts
Security·Oct 30, 2026·14 min read

KDDI Data Breach Explained: How a Zero-Day Exposed 12 Million ISP Email Accounts

A zero-day in third-party software let attackers into the email platform KDDI runs for six Japanese ISPs. Who was hit, what leaked, what regulators did and what to do now.