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[Investigating][Severity: Moderate][Intrusion]

Shinryo: cyberattack causes a system outage

On 17 October, unauthorized access caused a system outage at Shinryo, an HVAC and plumbing contractor, and the investigation found it was a cyberattack. Some services it provides were affected, and it contacted affected customers and partners individually. As of 21 October, no leak of personal or customer data had been found.

Disclosed

2026-10-21

Organizations involved

1

Leaked or at risk

Unknown

Downtime

Unknown

Timeline

  1. Started, Detected 2026-10-17
  2. Disclosed 2026-10-21
  3. 4 days

Attack or cause

Method
[Intrusion]
Impact
[Service outage]
Entry point
Unknown

Data exposed or at risk

–

Organizations involved

Open in organization search

Sources

  1. [1][Official]サイバー攻撃によるシステム障害発生についてShinryo · 2026-10-21