Incident Response
Incident response is the organized approach to addressing and managing security breaches and cyberattacks, frequently evaluated in buyer questionnaires.
Definition
Incident response is a structured methodology for detecting, containing, eradicating, and recovering from security incidents. An incident response plan (IRP) defines roles, responsibilities, communication protocols, and procedures for handling security events.
Context
Incident response questions appear in virtually every security questionnaire. Buyers want to understand detection capabilities, response time SLAs, escalation procedures, notification timelines (especially in relation to regulations like GDPR's 72-hour notification requirement), post-incident review processes, and whether the vendor maintains a dedicated incident response team. Having a well-documented incident response plan and being able to cite specific SLAs in questionnaire responses demonstrates security maturity.
Why it matters
Incident response is the structured process for detecting, containing, eradicating, and recovering from security events. Most organizations follow the NIST SP 800-61 lifecycle: preparation, detection and analysis, containment, eradication and recovery, and post-incident activity. An effective IR plan defines severity classifications, escalation paths, communication templates, and role assignments so that when a breach occurs, the team executes a rehearsed playbook rather than improvising under pressure.
The most damaging pitfall is having an incident response plan that exists only as a document nobody has tested. Tabletop exercises and simulated incidents reveal gaps that static plans cannot — unclear escalation chains, missing contact information for third-party forensics firms, or notification timelines that violate contractual or regulatory requirements. Teams should run exercises quarterly, rotate scenario types across ransomware, data exfiltration, insider threat, and supply chain compromise, and update the plan based on lessons learned.
Security questionnaires consistently probe incident response maturity: whether a formal plan exists, how frequently it is tested, what the notification timeline is for affected customers, and whether the organization retains external forensics capability. Regulations like GDPR mandate 72-hour breach notification to supervisory authorities, while contracts often impose 24- or 48-hour customer notification windows. Organizations that document their IR plan, maintain evidence of tabletop exercises, and pre-negotiate retainer agreements with forensics firms answer these questions with confidence.