SecurityExpo 2025 Data Leak: Microsoft 365 Account of Contractor Hacked
The organizers of Japan’s Expo 2025 in Osaka have disclosed a potential leak of confidential data after unauthorized access to a Microsoft 365 account belonging to a subcontractor involved in event preparations. The breach may have exposed personal information of participants, including organizers and speakers, as well as email content and attachments. While the full scope of the leak and attack methods remains undisclosed, an investigation is already underway.
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