CS0-003 Vulnerability Management Practice Question
This CS0-003 practice question tests your understanding of vulnerability management. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. A key principle to apply: cISA KEV catalog lists vulnerabilities with active, credible exploitation evidence.. 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.
A vulnerability report has 900 findings. One medium CVSS vulnerability is listed in CISA KEV and has high EPSS; several high CVSS issues are not exploitable in the environment. What should the analyst recommend? For control selection, Which control best addresses the stated weakness without hiding risk?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Prioritize the KEV/high-EPSS issue after confirming asset exposure
Option C is correct because it combines external threat intelligence (CISA KEV and EPSS) with internal context (asset exposure) to prioritize a medium-severity vulnerability that is actively exploited and has a high probability of exploitation. This approach aligns with the NIST framework for risk-based vulnerability management, which emphasizes that not all high-CVSS vulnerabilities are exploitable in a given environment, while lower-scored vulnerabilities in KEV pose immediate risk.
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Always sort only by CVSS base score
Why it's wrong here
CVSS is useful but incomplete without exploitability and exposure.
✗
Remediate alphabetically by CVE ID
Why it's wrong here
CVE order has no risk meaning.
✓
Prioritize the KEV/high-EPSS issue after confirming asset exposure
Why this is correct
Known exploitation and likelihood can outweigh base CVSS in risk-based prioritization.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
CISA KEV catalog lists vulnerabilities with active, credible exploitation evidence.
✗
Remediate only vulnerabilities with vendor logos in the report
Why it's wrong here
Vendor branding is irrelevant to risk.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that CVSS base score alone determines priority, but the trap here is that candidates overlook the criticality of threat intelligence (KEV and EPSS) and environmental context, leading them to choose a high-CVSS-only approach despite non-exploitability.
Detailed technical explanation
How to think about this question
CISA KEV lists vulnerabilities known to be exploited in the wild, and EPSS (Exploit Prediction Scoring System) uses machine learning on real-world exploit data to predict the probability of exploitation within 30 days; a high EPSS score (e.g., >0.9) indicates near-certain exploitation. In practice, an analyst would query the asset inventory (e.g., via a CMDB or vulnerability scanner) to confirm the affected software is present and exposed, then prioritize remediation over non-exploitable high-CVSS findings, reducing mean time to remediate (MTTR) for active threats.
KKey Concepts to Remember
CISA KEV catalog lists vulnerabilities with active, credible exploitation evidence.
EPSS predicts the likelihood of a vulnerability being exploited in the next 30 days.
Risk-based prioritization combines severity (CVSS) with exploitability (KEV, EPSS) and asset exposure.
Environmental context can reduce the actual risk of high CVSS vulnerabilities.
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
CISA KEV catalog lists vulnerabilities with active, credible exploitation evidence.
Real-world example
How this comes up in practice
A security team runs a vulnerability scan on a web application and discovers an unpatched SQL injection flaw. The team prioritises remediation by CVSS score — critical flaws are patched within 24 hours, high within 7 days. Questions like this test whether you understand vulnerability management processes, scanning tools, and remediation prioritisation.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CS0-003 question in full detail.
Review cISA KEV catalog lists vulnerabilities with active, credible exploitation evidence., then practise related CS0-003 questions on the same topic to reinforce the concept.
Vulnerability Management — This question tests Vulnerability Management — CISA KEV catalog lists vulnerabilities with active, credible exploitation evidence..
What is the correct answer to this question?
The correct answer is: Prioritize the KEV/high-EPSS issue after confirming asset exposure — Option C is correct because it combines external threat intelligence (CISA KEV and EPSS) with internal context (asset exposure) to prioritize a medium-severity vulnerability that is actively exploited and has a high probability of exploitation. This approach aligns with the NIST framework for risk-based vulnerability management, which emphasizes that not all high-CVSS vulnerabilities are exploitable in a given environment, while lower-scored vulnerabilities in KEV pose immediate risk.
What should I do if I get this CS0-003 question wrong?
Review cISA KEV catalog lists vulnerabilities with active, credible exploitation evidence., then practise related CS0-003 questions on the same topic to reinforce the concept.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
CISA KEV catalog lists vulnerabilities with active, credible exploitation evidence.
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