> JapanHacked_
[Investigating][Severity: Major][Web app exploit]

Basic: unauthorized access to the ferret One marketing platform

On 27 October, Basic disclosed that a flaw in an internal admin function of its B2B marketing platform ferret One let a third party create a rogue account on 14 October. It found and deleted the account on 26 October, closed the route and fixed the flaw. Unauthorized logins were confirmed on six accounts of Basic and its customers, and the email addresses customers use to log in may have been viewed or taken. What the six accounts could reach is still under investigation. Two-step authentication is now mandatory and the affected passwords were reset. The service continues.

Disclosed

2026-10-27

Organizations involved

1

Leaked or at risk

Unknown

Downtime

Unknown

Timeline

  1. Started 2026-10-14
  2. Detected 2026-10-26
  3. Disclosed 2026-10-27
  4. 13 days

Attack or cause

Method
[Web app exploit]
Impact
[Data leak]
Entry point
Web app

Data exposed or at risk

[E-mail address]

Services hit

Organizations involved

Open in organization search

Sources

  1. [1][Official]当社サービスへの不正アクセスに関するお知らせ(第一報)Basic · 2026-10-27