Arara email service breach exposes up to 2.23 million TKC user email addresses
SpilloverSpillover from the Arara incident · View original incident →Further disclosures revealed that up to 2,230,812 email addresses belonging to users of systems operated by TKC were exposed through a breach of Arara’s email service. An investigation is examining whether information belonging to users of local authority online application services, including those in Yokohama and Kawasaki, was also affected.
Key facts
- Affected organisation
- TKC
- Original incident
- Arara email service cyber-attack exposes 81.33 million email addresses
- Incident type
- Data breach
- Occurred / detected
- Not confirmed
- Scale of damage
- Up to 2,230,812 user email addresses
- Cause / method
- Breach of Arara’s email service
- Location
- Japan
If your data was exposed
Exposed dataEmail
- Don’t tap links in texts, calls or emails that mention this incident and offer compensation, refunds or breach checks. Check directly on the organisation’s official website or app.
Timeline
- Further disclosures revealed the exposure of up to 2,230,812 email addresses belonging to users of systems operated by TKC.
Original incident
This is spillover from the Arara incident.
Arara email service cyber-attack exposes 81.33 million email addresses
81.3mImpact: 81,329,467 email addresses and some customers' member information
Japan's Arara Message email delivery service was breached through a web server vulnerability, exposing email addresses and some customers' member information. Further investigation put the number of unique email addresses exposed at 81,329,467. The attacker also misused the service to send up to approximately 7.13 million emails impersonating credit card companies, and the company isolated the servers and suspended its email delivery service entirely.
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The summary and key facts are written by AI from related reports and may contain errors. Check the original articles and the organisation’s official statements for accurate details.