Kodansha
2LowConfirmedAnnounced
A staff email account was hijacked. Up to 3,812 contacts were stolen, and fake emails went to 553 of them.
This incident was imported from a dataset that compiles public announcements, and we are still checking it against the sources. Counts and causes will be updated after the check. Sources are in Japanese.
- Cause
- Email account compromise
- Sector
- Media & publishing
- Operational impact
- None
Data involved
| Data | Status | Count | Group | Evidence |
|---|---|---|---|---|
| Email address | Leak confirmed | up to 3,812 records | 社員の連絡先データ | Source(opens in a new tab) |
| Name | Leak confirmed | Not disclosed | 社員の連絡先データ | Source(opens in a new tab) |
| Credentials | Leak confirmed | Not disclosed | 侵入に悪用された社員メールアカウント | Source(opens in a new tab) |
Counts are the figures the organization announced. Because the same person may be counted more than once, we do not add the rows together.
What users should do
- Change your password
- Change the password on other services where you reused it
- Watch for emails and texts pretending to be the company
General steps based on the type of data involved. Check the organization’s notice or help line to see whether you are affected.