CS0-003 Vulnerability Management Practice Question
This CS0-003 practice question tests your understanding of vulnerability management. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
A security analyst discovers a server that is missing multiple critical patches. The server hosts a legacy application that cannot be patched immediately due to compatibility issues. Which of the following is the BEST approach to manage the vulnerability 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.
Clue: "immediately / without restart"
Why it matters: Time or reboot constraint — the correct answer must take effect right away without requiring a reboot or reload.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Implement network segmentation and increase monitoring
Option B is the best approach because network segmentation isolates the vulnerable legacy server from critical assets, reducing the attack surface, while increased monitoring allows the security team to detect and respond to any exploitation attempts in real time. This balances risk acceptance with active defense, which is a core principle of vulnerability management when patching is not immediately feasible.
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.
✗
Apply a virtual patch using a WAF
Why it's wrong here
A WAF may help but does not fully address all vulnerabilities and can introduce latency.
✓
Implement network segmentation and increase monitoring
Why this is correct
This reduces risk by isolating the server and enabling detection of attacks.
Clue confirmation
The clue words "best", "immediately / without restart" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Disable the server until a patch is available
Why it's wrong here
Similar to B, this halts operations unnecessarily.
✗
Remove the server from the network
Why it's wrong here
This is too disruptive; the server serves a business need.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often choose 'Apply a virtual patch using a WAF' because they overestimate the scope of WAF protection, forgetting that it only covers web-based attacks and not OS-level or protocol-level vulnerabilities.
Trap categories for this question
Similar concept trap
Similar to B, this halts operations unnecessarily.
Detailed technical explanation
How to think about this question
Network segmentation can be implemented using VLANs (IEEE 802.1Q) and ACLs to restrict traffic to only necessary ports and protocols, while increased monitoring might involve deploying a network-based IDS/IPS (e.g., Snort or Suricata) to inspect traffic for exploit signatures. In a real-world scenario, a legacy server running Windows Server 2008 with unpatched EternalBlue (MS17-010) could be isolated in a separate subnet with a strict firewall rule allowing only specific IPs on port 445, while a SIEM correlates logs from the host and network sensors to alert on SMB exploitation attempts.
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 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.
Vulnerability Management — This question tests Vulnerability Management — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Implement network segmentation and increase monitoring — Option B is the best approach because network segmentation isolates the vulnerable legacy server from critical assets, reducing the attack surface, while increased monitoring allows the security team to detect and respond to any exploitation attempts in real time. This balances risk acceptance with active defense, which is a core principle of vulnerability management when patching is not immediately feasible.
What should I do if I get this CS0-003 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: "best", "immediately / without restart". 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?
Read the scenario before looking for a memorised answer.
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Question Discussion
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