The answer is the post-incident phase. This is the correct choice because notifying law enforcement during earlier stages like containment or eradication could compromise forensic integrity and disrupt operational continuity, as evidence must first be fully preserved and the incident thoroughly documented. On the Certified Information Security Manager CISM exam, this question tests your understanding of the incident response lifecycle and the legal obligations tied to breach notification laws such as GDPR Article 33 or the HIPAA Breach Notification Rule. A common trap is assuming law enforcement should be called immediately upon discovery, but the exam emphasizes that external stakeholder notification is deliberately deferred until after containment and eradication are complete, ensuring that legal and regulatory requirements are met without interfering with the response itself. To remember this, think “Police after peace is restored”—law enforcement enters only once the immediate threat is neutralized and the scene is ready for formal review.
CISM Incident Management Practice Question
This CISM practice question tests your understanding of incident management. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Exhibit
Refer to the exhibit.
```
Policy: IncidentResponse
- Phase: Detection
- Action: Alert security team
- Phase: Analysis
- Action: Determine scope and impact
- Phase: Containment
- Action: Isolate affected systems
- Phase: Eradication
- Action: Remove malware
- Phase: Recovery
- Action: Restore from backup
- Phase: Post-Incident
- Action: Conduct lessons learned
```
Based on the incident response policy exhibit, which phase should include notifying external stakeholders such as law enforcement?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Post-Incident
B is correct because the post-incident phase is the appropriate time to notify external stakeholders such as law enforcement, as it occurs after containment and eradication are complete. During this phase, the incident is fully documented, evidence is preserved, and legal obligations (e.g., breach notification laws like GDPR Article 33 or HIPAA Breach Notification Rule) are fulfilled. Notifying law enforcement earlier could compromise forensic integrity or operational continuity, so it is deliberately deferred to the post-incident stage.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Recovery
Why it's wrong here
Recovery restores operations.
✓
Post-Incident
Why this is correct
Post-incident includes reporting and lessons learned, which may involve external notifications.
Related concept
Read the scenario before looking for a memorised answer.
✗
Detection
Why it's wrong here
Detection is about identifying the incident.
✗
Containment
Why it's wrong here
Containment focuses on limiting damage.
Common exam traps
Common exam trap: answer the scenario, not the keyword
ISACA often tests the misconception that law enforcement must be notified immediately upon detection, but the correct timing is after containment and eradication to avoid compromising evidence and operational response.
Detailed technical explanation
How to think about this question
In incident response frameworks like NIST SP 800-61, the post-incident phase includes a formal lessons-learned meeting and the creation of a final incident report, which may trigger external notifications based on legal or regulatory requirements. For example, under the Computer Fraud and Abuse Act (CFAA) or state breach notification laws, law enforcement notification is often mandatory only after the incident is fully understood and evidence is chain-of-custody documented. This phase also involves updating playbooks and threat intelligence feeds (e.g., STIX/TAXII) based on indicators of compromise (IOCs) gathered during the incident.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the CISM exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Incident Management — This question tests Incident Management — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Post-Incident — B is correct because the post-incident phase is the appropriate time to notify external stakeholders such as law enforcement, as it occurs after containment and eradication are complete. During this phase, the incident is fully documented, evidence is preserved, and legal obligations (e.g., breach notification laws like GDPR Article 33 or HIPAA Breach Notification Rule) are fulfilled. Notifying law enforcement earlier could compromise forensic integrity or operational continuity, so it is deliberately deferred to the post-incident stage.
What should I do if I get this CISM question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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