The correct answer is the exposed service, because VNC and the web admin interface are reachable from untrusted networks. This prioritization hinges on the principle of least exposure: services like VNC (port 5900) and administrative web interfaces are well-known attack vectors for remote code execution and credential theft, and leaving them accessible from the internet directly increases your attack surface and risk of unauthorized access. On the Security+ SY0-701 exam, this tests your ability to apply vulnerability prioritization by focusing on what is externally reachable versus internal misconfigurations—a common trap is to fix a high-severity internal vulnerability first while ignoring an exposed service that is already under active threat. Remember the mnemonic “E.S.P.”: Exposed Services First—if it’s reachable from untrusted networks, it gets top priority.
SY0-701 Threats, Vulnerabilities, and Mitigations Practice Question
This SY0-701 practice question tests your understanding of threats, vulnerabilities, and mitigations. 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.
Exhibit
External vulnerability scan summary for a small branch office server:
Host: 203.0.113.44
Open ports:
22/tcp open ssh
80/tcp open http
5900/tcp open vnc
Findings:
- VNC authentication: disabled
- SSH: restricted to password login only
- Web admin page accessible from any source network
- Server is in the DMZ and stores customer support tickets
Based on the exhibit, which security issue should the analyst report first?
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.
External vulnerability scan summary for a small branch office server:
Host: 203.0.113.44
Open ports:
22/tcp open ssh
80/tcp open http
5900/tcp open vnc
Findings:
- VNC authentication: disabled
- SSH: restricted to password login only
- Web admin page accessible from any source network
- Server is in the DMZ and stores customer support tickets
A
Outdated component, because the scan did not list software version details.
Why wrong: There is no evidence of a specific obsolete package or version in the exhibit. The scan is highlighting access exposure and weak settings, not a known end-of-life component.
B
Exposed service, because VNC and the web admin interface are reachable from untrusted networks.
The most important issue is the exposed service because remote management interfaces are reachable from any source network, and VNC authentication is disabled. That combination creates a high-risk attack surface, especially for a server in the DMZ that stores sensitive customer information.
C
Weak permissions, because SSH requires password login only.
Why wrong: Password-only SSH is a weakness, but the exhibit does not show file or folder permissions. The main risk is that externally reachable administrative services are exposed without strong access control.
D
Default credentials, because the server is in the DMZ.
Why wrong: The DMZ placement does not imply default credentials. The scan does not mention a factory username and password pair, so that is not supported by the evidence.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Exposed service, because VNC and the web admin interface are reachable from untrusted networks.
Option B is correct because the scan reveals that VNC (port 5900) and a web admin interface (port 443 or 8080) are exposed to untrusted networks, such as the internet. This violates the principle of least exposure, as these services are known attack vectors for remote code execution and credential theft. The analyst should prioritize this issue because an exposed service directly increases the attack surface and risk of unauthorized access, whereas other findings may be less immediately critical.
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.
✗
Outdated component, because the scan did not list software version details.
Why it's wrong here
There is no evidence of a specific obsolete package or version in the exhibit. The scan is highlighting access exposure and weak settings, not a known end-of-life component.
✓
Exposed service, because VNC and the web admin interface are reachable from untrusted networks.
Why this is correct
The most important issue is the exposed service because remote management interfaces are reachable from any source network, and VNC authentication is disabled. That combination creates a high-risk attack surface, especially for a server in the DMZ that stores sensitive customer information.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Weak permissions, because SSH requires password login only.
Why it's wrong here
Password-only SSH is a weakness, but the exhibit does not show file or folder permissions. The main risk is that externally reachable administrative services are exposed without strong access control.
✗
Default credentials, because the server is in the DMZ.
Why it's wrong here
The DMZ placement does not imply default credentials. The scan does not mention a factory username and password pair, so that is not supported by the evidence.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often focus on missing version details (Option A) or default credentials (Option D) as the most critical finding, but CompTIA emphasizes that exposed services on untrusted networks pose the highest immediate risk because they are directly exploitable without requiring prior access.
Trap categories for this question
Command / output trap
Password-only SSH is a weakness, but the exhibit does not show file or folder permissions. The main risk is that externally reachable administrative services are exposed without strong access control.
Detailed technical explanation
How to think about this question
VNC (RFB protocol) often runs without encryption or with weak authentication, making it a prime target for man-in-the-middle attacks or direct brute-force. Web admin interfaces, especially on non-standard ports, frequently use default credentials or have known CVEs (e.g., CVE-2023-xxxx for unauthenticated RCE). In real-world scenarios, attackers scan for these exposed services using tools like Shodan or Masscan, and a single exposed VNC port has led to full network compromise in incidents like the 2021 Kaseya attack.
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 SY0-701 question in full detail.
Threats, Vulnerabilities, and Mitigations — This question tests Threats, Vulnerabilities, and Mitigations — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Exposed service, because VNC and the web admin interface are reachable from untrusted networks. — Option B is correct because the scan reveals that VNC (port 5900) and a web admin interface (port 443 or 8080) are exposed to untrusted networks, such as the internet. This violates the principle of least exposure, as these services are known attack vectors for remote code execution and credential theft. The analyst should prioritize this issue because an exposed service directly increases the attack surface and risk of unauthorized access, whereas other findings may be less immediately critical.
What should I do if I get this SY0-701 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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