nice-mail-2026 · Disclosed 2026-08-06
ナイス: unauthorized access and impact
An inquiry mailbox was accessed; the August 21 update confirms spam sent from it. About 2,400 contact records may have leaked.
Outcome: Confirmed breach
Entry path and evidence
Timeline
Disclosure date established by the reviewed notice. [s1]
Reported response
- Reported fact
Mailbox and administrative passwords were changed and sending disabled.
[s1]§§1-4 / 8月21日追記
Cause and mitigation hypotheses
Not assessed. Editorial hypotheses have not been added for this incident; this does not establish safety or a confirmed cause.
Evidence relevant to prevention
Insufficient evidence
Undisclosed entry or patch timing prevents an avoidability assessment. Inspect privileges, retrieval logs, retention and deployed configuration using the linked rules.
Editorial assessment; not a determination of liability. [s1]
Unknowns and AI involvement
The reviewed disclosures do not establish attacker use of AI.
The initial entry route and actual disclosure scope are undisclosed. Unauthorized mail transmission was confirmed.
Sources
[s1] ナイス · Primary source
ナイス：事故に関する公表資料 ↗Reviewed 2026-10-09