When Joseph, the IH&R team lead, alerted service providers, developers, and manufacturers about the affected resources, he was engaged in the Containment stage of the Incident Handling and Response (IH&R) process.
Containment involves taking steps to limit the spread or impact of an incident and to isolate affected systems to prevent further damage. Alerting relevant stakeholders, including service providers and developers, is part of containment efforts to ensure that the threat does not escalate and that measures are taken to protect unaffected resources. This stage precedes eradication and recovery, focusing on immediate response actions to secure the environment.References:The ECIH v3 certification program outlines the IH&R process stages, explaining the roles and actions involved in containment, including communication with external and internal stakeholders to manage and mitigate the incident's effects.