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. 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 is reviewing a report from an authenticated vulnerability scan of a Windows domain controller. The report indicates multiple critical vulnerabilities related to Active Directory. The system administrator claims the patches have been applied. Which of the following is the MOST likely cause of the discrepancy?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The patches require a reboot
The most likely cause is that the patches require a reboot. Many critical Active Directory vulnerabilities, such as those in Kerberos or LSASS, are mitigated by patches that only take effect after a system restart. The authenticated scan detects the vulnerability because the patched files are not yet loaded into memory, even though the patches are installed on disk.
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.
✗
The vulnerabilities are false positives
Why it's wrong here
False positives are possible but less likely with authenticated scans and critical vulnerabilities.
✗
The scan was run with insufficient credentials
Why it's wrong here
The scan was authenticated, so credentials were likely sufficient.
✗
The scan was run before patch installation
Why it's wrong here
The administrator claimed patches were applied, so timing is less likely.
✓
The patches require a reboot
Why this is correct
Patches often need a reboot; if not rebooted, the vulnerability remains.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the concept that patch installation does not equal vulnerability remediation until a reboot occurs, leading candidates to incorrectly assume false positives or credential issues.
Detailed technical explanation
How to think about this question
Under the hood, vulnerability scanners like Nessus or Qualys check for patch installation by querying the Windows Registry (e.g., HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall) or using WMI to list installed updates. However, many security patches for Active Directory components (e.g., CVE-2020-1472 for Netlogon) require a reboot to replace in-memory drivers or services like LSASS. Until reboot, the vulnerable code remains active, and the scanner correctly flags the system as vulnerable despite the patch being present on disk.
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: The patches require a reboot — The most likely cause is that the patches require a reboot. Many critical Active Directory vulnerabilities, such as those in Kerberos or LSASS, are mitigated by patches that only take effect after a system restart. The authenticated scan detects the vulnerability because the patched files are not yet loaded into memory, even though the patches are installed on disk.
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: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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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