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[Resolved][Severity: Moderate][Credential abuse]

King Printers: cloud credentials abused for AI calls; investigation finds no customer-data exposure

Cloud credentials were abused for AI calls on 10 September. The website temporarily closed and reopened; the final report finds no customer-data acquisition or transfer.

Disclosed

2026-09-14

Organizations involved

1

Leaked or at risk

Unknown

Downtime

Unknown

Attack and service restoration

Between 06:51 and 13:44 on 10 September, an attacker abused infrastructure credentials to make large numbers of AI-service calls from multiple IP addresses. Provider limits stopped the abuse; the compromised credentials and attacker-created credentials were deleted that day. [2]

For safety checks, the site and related functions closed at 18:00 on 10 September and reopened at 16:00 on the 14th. The final 9 November investigation found no access to customer databases, storage or servers, tampering, theft or data transfers to suspicious IPs. Payment data was not held; customer passwords were hashed. Planned measures include temporary infrastructure credentials instead of static ones. [1] [2]

Timeline

  1. Started, Detected 2026-09-10
  2. Disclosed 2026-09-14
  3. 4 days

Attack or cause

Method
[Credential abuse]
Impact
[Service outage]
Entry point
Stolen credentials

Data exposed or at risk

–

Services hit

Organizations involved

Sources

  1. [1][Official]不正アクセス検知に伴うシステム停止・サービス再開および調査状況のお知らせKing Printers Inc. · 2026-09-14
  2. [2][Official]不正アクセス検知に伴う調査結果および再発防止策のご報告【最終報】King Printers Inc. · 2026-11-09