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breaches incidents
Major Japanese telco says cyberattack exposed 12 million emails
A major Japanese telecommunications company disclosed that a cyberattack compromised an email system serving multiple internet service providers, affecting approximately 12 million email addresses. The affected system managed customer email accounts, webmail services, and email storage across five Japanese ISPs.
Why it matters: ISP and email customers across Japan face potential credential and personal data exposure; practitioners should assess whether their organization uses services from the affected telco or ISPs and implement credential monitoring.
- Source published
- First seen by Cybersecurity Tracker