What is a CSIRT or CERT?

A CSIRTCSIRT: computer security incident response team. The national team to which serious incidents are reported. (Computer Security Incident Response Team), also called a CERT, is a team that handles security incidents. Every EU country has a national CSIRT, and under the NIS2NIS2: the EU's second Network and Information Security directive. The EU cybersecurity law (Directive (EU) 2022/2555) that sets security and incident-reporting duties for many companies. Directive companies in scope report significant incidents to their CSIRT or competent authority: an early warning within 24 hours, a fuller notification within 72 hours and a final report within a month. National CSIRTs also publish warnings about vulnerabilities being exploited, which are worth subscribing to. Large companies sometimes have their own internal CSIRT. NetSenX tracks NIS2 reporting deadlines on every plan.

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Terms used here

CSIRT (computer security incident response team)
The national team to which serious incidents are reported.
NIS2 (the EU's second Network and Information Security directive)
The EU cybersecurity law (Directive (EU) 2022/2555) that sets security and incident-reporting duties for many companies.

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