The CSIRTs Network is the European cooperation framework that connects national and sectoral Computer Security Incident Response Teams across member states. Its purpose is to build trust, align procedures, and enable rapid coordination when cyber incidents cross organizational or national boundaries.
In cyber security, this matters because attacks rarely stay isolated. A phishing campaign, malware outbreak, or supply-chain compromise can affect multiple entities at once, and response teams need a safe way to share indicators, confirm impact, and escalate without delay. The CSIRTs Network supports that collaboration through established channels, which improves containment, reduces duplicated effort, and helps defenders compare threat patterns. It is a defensive capability, but it also shapes incident handling in practice by setting expectations for communication, confidentiality, and coordinated action.