A Computer Security Incident Response Team (CSIRT) is an organized group or capability that coordinates action when a computer security incident occurs. Its central work is to recommend and coordinate immediate mitigation, including containment, eradication, and recovery. The team’s structure and exact services depend on the organization it serves.
What does CSIRT mean?
CSIRT stands for Computer Security Incident Response Team. NIST’s glossary defines a computer incident response team as a group, usually consisting of security analysts, organized to develop, recommend, and coordinate immediate mitigation actions following computer security incidents. NIST also records CIRT and CIRC as related names; CIRC can refer to a Computer Incident Response Center, Computer Incident Response Capability, or Cyber Incident Response Team.
As an Amazon Associate I earn from qualifying purchases.
NIST CSRC glossary: Computer incident response team
What does a CSIRT do?
A CSIRT helps an organization respond in a coordinated way: it may receive reports of possible incidents, investigate them, and organize actions intended to limit damage. NIST’s definition highlights three core mitigation stages:
- Containment: limit an incident’s spread or effects.
- Eradication: address the cause or remove the threat from affected systems.
- Recovery: restore affected systems or operations.
These are response goals, not a guarantee that every team performs every technical task itself. A CSIRT can coordinate with IT, security, business teams, or external parties as needed.
What counts as a computer security incident?
NIST’s glossary describes a computer security incident as an occurrence that actually or imminently jeopardizes the confidentiality, integrity, or availability of information or an information system, or that violates—or imminently threatens to violate—law or security policy. Organizations use their policies and response plans to determine how incidents are reported, assessed, and escalated.
Rank #2
NIST CSRC glossary: Computer Security Incident
Does every CSIRT have the same responsibilities?
No. The name does not prescribe a single department structure or service package. NIST SP 800-61 Rev. 2 described incident response teams as providing services to some or all of an organization. It also gave examples of additional services, such as intrusion-detection-system monitoring and management, distributing threat advisories, and educating users and IT staff about their incident-prevention and response roles. Those examples are not a universal minimum.
Recommended Free Tools
NIST SP 800-61 Rev. 2 publication record
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How does current NIST guidance describe incident response?
NIST finalized SP 800-61 Rev. 3 on April 3, 2025, superseding Rev. 2. The newer guide places incident response within cybersecurity risk management and aligns its recommendations with the six functions of the NIST Cybersecurity Framework 2.0. Use Rev. 3 for current NIST recommendations; Rev. 2 remains relevant when describing the older guide’s account of team responsibilities and example services.
Rank #3
NIST announcement: SP 800-61 revision, April 3, 2025
Quick Recap
Best Value
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
