About 2.2 million Sega newsletter email addresses leaked
Unauthorized access to the systems of Arara, Sega’s newsletter delivery provider, resulted in the leak of 2,196,044 subscriber email addresses. Sega investigated the incident and advised users to watch out for phishing emails. Sega accounts and users’ financial information were not affected.
Key facts
- Affected organization
- Sega
- Incident type
- Data breach
- Occurred / detected
- Not confirmed
- Scale of damage
- 2,196,044 newsletter subscriber email addresses
- Cause / method
- Unauthorized access to the systems of Arara, the newsletter delivery provider
- 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 organization’s official website or app.
Timeline
- It emerged that unauthorized access to Sega’s newsletter delivery provider’s systems had exposed 2,196,044 email addresses.
- Sega announced the leak of subscriber email addresses and urged users to watch out for phishing emails.
- It was reported that Sega was investigating the incident and that users’ financial information had not been affected.
21 related reports
- セガのメルマガ配信委託先に不正アクセス、メールアドレス219万件超が流出―『CHUNITHM』『maimai』稼働告知などの配信先
- セガ、委託先システムに不正アクセスでメアド流出。2,196,044件（GAME Watch）
- セガ、委託先システムに不正アクセスでメアド流出。2,196,044件
- セガ メールアドレス219万件余流出 アララ不正アクセスの影響
- セガとセガ系玩具メーカー、個人情報219万件漏洩 アララ不正アクセス
- Cyberattack on Sega third-party newsletter distributor reportedly sees over two million email addresses leaked, but Sega accounts unaffected
- SEGA Confirms Data Breach of Over 2 Million Email Addresses
- SEGA newsletter data breach exposes 2.2 million email addresses
- SEGA集團因日本Arara資安事件外洩資料220萬筆
- 世嘉通报约220万新闻订阅邮箱泄露，提醒用户谨防钓鱼邮件
- SEGA Confirms Data Breach After Third-Party Email Provider Exposes 2.19 Million Customer Email Addresses
- SEGA confirms 2.2 million email addresses exposed in newsletter data breach
- 世嘉邮箱服务商Arara泄露超200万地址
- Breach at newsletter provider ARARA exposes 2.2 million SEGA subscriber email addresses
- Sega newsletter data breach sees 2.2 million email addresses exposed — gaming giant says it is investigating, but user financial data not affected
- SEGA confirms newsletter data breach, exposing 2.2 million users
- SEGA newsletter data breach has exposed 2.2 million email addresses
- Sega supplier cyberattack exposes data of 2.1M users
- SEGA confirms data breach exposing 2.2M email addresses
- Sega data breach: Everything we know so far as 2.2 million customers exposed
- 日本世嘉公司证实，2,2万用户的数据遭到泄露。究竟泄露了哪些信息？
Other incidents at Sega
Sega announces follow-up measures after unauthorised access halts Lucky Kuji online sales
Impact: Suspension of sales of certain online lottery products
Sega Lucky Kuji Online and related services have been suspended since November 1, 2026, for safety checks following unauthorized access to Sega Fave's servers. This report concerns follow-up measures for certain lottery products whose sales were suspended, rather than a new incident.
Read on Yahoo!ニュース ↗
The summary and key facts are written by AI from related reports and may contain errors. Check the original articles and the organization’s official statements for accurate details.