Incident Response
Definition
Incident Response is the structured handling of security incidents from preparation through detection and response to recovery and improvement.
Modern incident response programs combine technical response with communication, roles, risk, and recovery processes. NIST SP 800-61 Rev. 3 integrates incident response into the overall cybersecurity risk management process.
Simply explained
Like an emergency plan for IT security incidents that is practiced beforehand and improved afterward.
Why it matters in practice
Relevant for websites, cloud systems, identities, data, and AI integrations because incidents remain possible despite protective measures.
Example from business
After compromised credentials, the team locks accounts, rotates keys, analyzes logs, restores secure services, and documents causes.
Limits and pitfalls
- Clarifying roles only during the incident; overwriting evidence; lacking communication channels; recovery without root cause analysis; never conducting exercises.
Origin & history
In 2025, NIST published SP 800-61 Revision 3, replacing Revision 2. The current approach integrates incident response more strongly into CSF-2.0 risk management.
Use in mid-sized companies
- Possible applications: incident runbooks for website, cloud access, API keys, data leaks, and AI systems.
Frequently asked questions
Does every company need an incident plan?
The scope depends on risk, but defined roles and response paths are generally sensible. Is backup incident response? Only part of possible recovery measures.
Sources
- NIST SP 800-61 Rev. 3 · NIST SP 800-61 Rev. 3
Sources checked on 10.10.2026.
Editorially reviewed on: