CS0-003 Vulnerability Management Practice Question
Which of the following vulnerability lifecycle phases involves verifying that a remediation has been successfully applied and that the vulnerability no longer exists?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Verification
Verification is the phase where after remediation, the system is rescanned or checked to confirm the vulnerability is mitigated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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Discovery
Why it's wrong here
Discovery is the initial phase of the vulnerability management lifecycle, where scanning tools and asset inventories identify potential weaknesses across the environment. It happens before remediation is even planned, so it cannot be the phase that confirms a fix was successful.
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Prioritization
Why it's wrong here
Prioritization occurs after discovery, ranking identified vulnerabilities by severity, exploitability, and asset criticality, often combining CVSS with business context, to decide remediation order. It determines what gets fixed first, not whether a fix actually worked.
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Remediation
Why it's wrong here
Remediation is the action phase where the fix itself, such as a patch, configuration change, or compensating control, is applied to the affected system. It precedes verification and does not itself confirm whether the applied fix actually eliminated the vulnerability.
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Verification
Why this is correct
Verification is the closing phase of the lifecycle, where the analyst re-scans or otherwise re-tests the previously vulnerable asset to confirm the remediation was applied correctly and the vulnerability no longer exists, closing the loop before the finding can be marked resolved in the tracking system.
Go deeper
Related to this question
Learn chapter
Vulnerability Scanning Techniques
Key term
Vulnerability
A vulnerability is a weakness in a system, network, or software that could be exploited by a threat to cause harm or unauthorized access.
Key term
Remediation
Remediation is the process of fixing or eliminating vulnerabilities, misconfigurations, or security weaknesses in an IT environment.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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