The correct answer is to revoke the contractor's access immediately. This is because the principle of least privilege dictates that users should only have the minimum access necessary for their role, and any discovered over-provisioning represents an active security gap. In incident response, the first priority is always containment—revoking unauthorized access stops potential data exfiltration or misuse before any other step, such as notification or logging, can occur. On the ISC2 Certified in Cybersecurity CC exam, this scenario tests your understanding of the containment phase in the incident response process and the immediate application of access controls. A common trap is choosing to "investigate first" or "notify the manager," but delaying revocation leaves sensitive data exposed. Remember the memory tip: "Contain before you complain"—stop the unauthorized access before you escalate or document.
ISC2 CC Access Controls Concepts Practice Question
This CC practice question tests your understanding of access controls concepts. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
During a security audit, it is discovered that a contractor has access to customer databases that were not required for their project. Which step should be taken first to mitigate the risk?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Revoke the contractor's access immediately
The immediate priority is to revoke the contractor's access to the unauthorized customer databases to stop any potential data exfiltration or misuse. Access controls follow the principle of least privilege, and any discovered over-provisioning must be corrected instantly to contain the risk. Delaying revocation for notification, assessment, or logging leaves the sensitive data exposed to an unauthorized user.
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.
✗
Notify the contractor's manager
Why it's wrong here
Notifying management is important but does not directly stop the ongoing access.
✓
Revoke the contractor's access immediately
Why this is correct
Revoking access immediately stops the unauthorized access and reduces risk.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Perform a risk assessment
Why it's wrong here
Risk assessment should be done, but it is not the first step to mitigate immediate risk.
✗
Log the access for evidence
Why it's wrong here
Logging is useful for forensic purposes but does not mitigate the current risk.
Common exam traps
Common exam trap: answer the scenario, not the keyword
ISC2 often tests the candidate's ability to prioritize containment over investigation or notification, trapping those who choose risk assessment or logging first instead of immediate access revocation.
Detailed technical explanation
How to think about this question
In IAM systems, access revocation should be immediate via directory services (e.g., Active Directory group membership removal or AWS IAM policy detachment) rather than relying on manual processes. The principle of least privilege (RFC 2196) dictates that access rights should be granted only for the minimum necessary resources and duration. A real-world scenario: a contractor with read access to a production database could copy PII within seconds; revoking the database role or network ACL entry stops the threat instantly, while logging provides an audit trail for later investigation.
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 SOC analyst notices unusual lateral movement in the network at 2 AM. The IR playbook dictates: identify and contain (isolate the affected machine), then eradicate (remove the malware), then recover (restore from backup), then document. Skipping containment before eradication risks the attacker regaining access. Questions like this test the sequence and rationale of incident response phases.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CC question in full detail.
Access Controls Concepts — This question tests Access Controls Concepts — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Revoke the contractor's access immediately — The immediate priority is to revoke the contractor's access to the unauthorized customer databases to stop any potential data exfiltration or misuse. Access controls follow the principle of least privilege, and any discovered over-provisioning must be corrected instantly to contain the risk. Delaying revocation for notification, assessment, or logging leaves the sensitive data exposed to an unauthorized user.
What should I do if I get this CC question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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