Incidents on Jun 23, 2026

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Incidents on Jun 23, 2026
Date	Target	Summary	Classification	Source links
Jun 23, 2026 LEAK-009	BIGLOBE 'BIGLOBE Mail'	S 5,016,432 peopleA vulnerability in third-party software in the KDDI-developed mail platform was exploited, leaking BIGLOBE email addresses and BIGLOBE IDs of 5,016,432 persons, of whom 4,631,775 also had passwords leaked.	Supply chainConfirmedOfficial statement	biglobe.co.jp