Incident BriefingsApplied Materials (via supplier MKS Instruments) security incident

Applied Materials (via supplier MKS Instruments) security incident

Ransomware at MKS Instruments. Supplier outage cascaded into customer's shipments.

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Summary

  • Environment: Semiconductor supply chain
  • Operational impact: Supplier outage cascaded into customer's shipments
  • Financial impact: No financial figure is established by the reviewed source evidence
  • Record status: Developing record. Reviewed September 19, 2026; updated as evidence emerges.

What happened

In 2023, Applied Materials experienced an incident in its semiconductor supply chain environment. The retained source describes the attack path as follows: Ransomware at MKS Instruments. [1]

The documented consequence was: Supplier outage cascaded into customer’s shipments. [1]

Impact

  • Documented impact: Supplier outage cascaded into customer’s shipments. [1]
  • No financial loss, ransom amount, recovery cost, or regulatory penalty is established by the reviewed source evidence.

Threat Group & Attack Vector

The retained source describes the attack path as follows: Ransomware at MKS Instruments. The canonical record does not add intrusion steps beyond those supported by the source. [1]

Actors

  • No threat actor group has been identified in the reviewed public evidence.

TTPs

Response

The retained source describes containment action intended to limit further access or disruption. [1] The retained source describes system restoration or operational recovery work. [1]

This account is bounded to MKS Instruments Form 10-Q for the quarter ended June 30, 2023. Details absent from that evidence are left unresolved rather than inferred. [1]