Science & Tech · Cybersecurity · 14 hrs ago
Data from up to 300,000 Docomo customers exposed in cyberattack
NTT Docomo said a cyberattack exposed information from up to 300,000 customers using My docomo and the Docomo Online Shop in Japan.
The affected records include 204,157 individual customers and 90,682 corporate customers.
The exposed data includes identity document numbers and contract details, as well as names, addresses, dates of birth, phone numbers and email addresses.
Some customers also had bank account details, workplace information or information about a family support programme exposed.
Docomo is still investigating how the attackers got in and the full extent of the leak.
The company stopped procedures on both services from early on November 5, and it has not said when they will be restored.
Docomo is considering payments to customers affected by the incident.
NTT Docomo said information belonging to up to 300,000 customers was exposed after its My docomo and Docomo Online Shop services were accessed without authorization.
The exposed information included identity-document numbers and contract details, in addition to names, addresses, dates of birth and phone numbers.
Some customers’ bank account details and other personal information were also exposed.
The company is considering payments to affected users and is still investigating how the attack happened and the full scope of the exposure.
- Who
- NTT Docomo customers: 204,157 individual accounts and 90,682 corporate accounts.
- What
- Information from up to 300,000 customers was exposed in an unauthorized-access incident.
- When
- The company confirmed unauthorized access on November 4 and announced the expanded list of exposed information on November 6. The year is 2026.
- Where
- My docomo and Docomo Online Shop.
- Why
- The incident resulted from unauthorized access. The entry route is still under investigation.
This story does not have two clearly opposing sides.
Docomo confirmed unauthorized access to My docomo and Docomo Online Shop.
The company stopped various procedures on the sites from about 1:05 a.m. and issued an initial report listing exposed information.
Docomo announced that identity-document numbers and additional customer information were also exposed.
- Maximum exposed records
- 300,000
- Individual accounts
- 204,157
- Corporate accounts
- 90,682
- Affected services
- My docomo and Docomo Online Shop
- Procedures stopped
- About 1:05 a.m. on November 5
What people are saying
under investigation