TSS Link: about 250 support credentials and inquiry data may have leaked
An attack on its websites may have exposed about 250 support credentials and 160 inquiry records. No security problem in its products has been found.
Disclosed
2026-10-21
Organizations involved
1
Leaked or at risk
250
250
Downtime
Unknown
What happened
Impact
About 250 registered support user IDs and login passwords may have leaked. Separately, about 160 inquiry and trial application submissions may be affected, including names, emails, phone numbers, company and department names, maintenance user IDs, messages and attachments. No deduplicated total for the two groups was published. [1]
No conclusive evidence of data theft was found, but incomplete logs prevent it being ruled out. Customer and contract data linked to IDs are held in another system, with no confirmed leak. No security problem in its products or clear resulting harm has been found. [1]
Response
Timeline
- Started 2026-06-12
- Detected 2026-10-13
- Disclosed 2026-10-21
- 131 days
Attack or cause
- Method
- [Web app exploit]
- Impact
- [Data leak]
- Entry point
- Web app
Data exposed or at risk
Organizations involved
[Breached][Critical]Tokushima, TokushimaInformation and communications250 leaked
TSS Link, Inc.
Sources
- [1][Official]当社ウェブサイトへの不正アクセスに関するお詫びとお知らせTSS Link, Inc. · 2026-10-21
- [2][News]WPプラグインの脆弱性悪用 ~ ティエスエスリンクのウェブサイトに不正アクセス、製品にはセキュリティ上の問題 確認されておらずScanNetSecurity · 2026-11-02 08:05