CEH Vulnerability Analysis and System Hacking Practice Question
This CEH practice question tests your understanding of vulnerability analysis and system hacking. 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.
Exhibit
C:\Users\Admin> wmic qfe get HotFixID,InstalledOn
HotFixID InstalledOn
KB4569558 9/17/2020
KB4570333 9/17/2020
KB4574727 9/8/2020
KB4577586 9/8/2020
C:\Users\Admin> ver
Microsoft Windows [Version 10.0.19041.508]
C:\Users\Admin> reg query "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion" /v CurrentBuild
CurrentBuild REG_SZ 19041
Refer to the exhibit. A security analyst checks for missing patches. Which vulnerability is this system likely exposed to?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
PrintNightmare (CVE-2021-34527)
The system is Windows 10 build 19041 (2004) with patches up to 9/17/2020. EternalBlue (MS17-010) was patched in 2017, so it is likely patched. However, BlueKeep (CVE-2019-0708) affects older systems (Windows 7/2008 R2), not Windows 10. ZeroLogon (CVE-2020-1472) was patched in August 2020; the system has KB4577586 from 9/8/2020 which includes the fix. PrintNightmare (CVE-2021-34527) was disclosed in 2021, after the patch dates shown, so the system is likely vulnerable to PrintNightmare.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
EternalBlue (MS17-010)
Why it's wrong here
Patched in 2017; likely present.
✗
BlueKeep (CVE-2019-0708)
Why it's wrong here
Does not affect Windows 10.
✗
ZeroLogon (CVE-2020-1472)
Why it's wrong here
Patched by KB4577586 installed on 9/8/2020.
✓
PrintNightmare (CVE-2021-34527)
Why this is correct
Not patched as of the exhibited patch dates (2020).
Related concept
Static NAT maps one inside address to one outside address.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CEH question in full detail.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CEH NAT questions on configuration and troubleshooting.
Vulnerability Analysis and System Hacking — This question tests Vulnerability Analysis and System Hacking — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: PrintNightmare (CVE-2021-34527) — The system is Windows 10 build 19041 (2004) with patches up to 9/17/2020. EternalBlue (MS17-010) was patched in 2017, so it is likely patched. However, BlueKeep (CVE-2019-0708) affects older systems (Windows 7/2008 R2), not Windows 10. ZeroLogon (CVE-2020-1472) was patched in August 2020; the system has KB4577586 from 9/8/2020 which includes the fix. PrintNightmare (CVE-2021-34527) was disclosed in 2021, after the patch dates shown, so the system is likely vulnerable to PrintNightmare.
What should I do if I get this CEH question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CEH NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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