RS.CO-03 involves sharing incident information with designated stakeholders—both internal, like leadership, and external, like ISACs—consistent with response plans and agreements. This includes voluntary sharing of anonymized attack data or updates on insider threats with HR, enhancing situational awareness. It ensures relevant parties stay informed.

This subcategory strengthens response by aligning information flow with contractual rules and crisis protocols, such as supplier coordination. It promotes broader cybersecurity collaboration while protecting sensitive data. RS.CO-03 builds a network of informed responders and supporters.