Download CompTIA SecurityX Certification.CAS-005.PassLeader.2026-11-15.222q.tqb

Vendor: CompTIA
Exam Code: CAS-005
Exam Name: CompTIA SecurityX Certification
Date: Nov 15, 2026
File Size: 7 MB

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Question 1
A company hosts a platform-as-a-service solution with a web-based front end, through which customer interact with data sets. A security administrator needs to deploy controls to prevent application-focused attacks. Which of the following most directly supports the administrator's objective? 
  1. improving security dashboard visualization on SIEM 
  2. Rotating API access and authorization keys every two months 
  3. Implementing application toad balancing and cross-region availability 
  4. Creating WAF policies for relevant programming languages 
Correct answer: D
Explanation:
The best way to prevent application-focused attacks for a platform-as-a-service solution with a web-based front end is to create Web Application Firewall (WAF) policies for relevant programming languages. Application-Focused Attack Prevention: WAFs are designed to protect web applications by filtering and monitoring HTTP traffic between a web application and the Internet. They help prevent attacks such as SQL injection, cross-site scripting (XSS), and other application-layer attacks. Customizable Rules: WAF policies can be tailored to the specific programming languages and frameworks used by the web application, providing targeted protection based on known vulnerabilities and attack patterns. Real-Time Protection: WAFs provide real-time protection, blocking malicious requests before they reach the application, thereby enhancing the security posture of the platform. 
The best way to prevent application-focused attacks for a platform-as-a-service solution with a web-based front end is to create Web Application Firewall (WAF) policies for relevant programming languages. 
Application-Focused Attack Prevention: WAFs are designed to protect web applications by filtering and monitoring HTTP traffic between a web application and the Internet. They help prevent attacks such as SQL injection, cross-site scripting (XSS), and other application-layer attacks. 
Customizable Rules: WAF policies can be tailored to the specific programming languages and frameworks used by the web application, providing targeted protection based on known vulnerabilities and attack patterns. 
Real-Time Protection: WAFs provide real-time protection, blocking malicious requests before they reach the application, thereby enhancing the security posture of the platform. 
Question 2
A security analyst is reviewing the following log: 
Which of the following possible events should the security analyst investigate further? 
  1. A macro that was prevented from running 
  2. A text file containing passwords that were leaked 
  3. A malicious file that was run in this environment 
  4. A PDF that exposed sensitive information improperly 
Correct answer: C
Explanation:
The antivirus status shows some files were blocked (meaning the antivirus prevented them), but some files were allowed. Specifically: - At 11:27, a .dll file (dynamic-link library) was allowed at c:\temp. - DLL files can contain executable code, and if it was allowed without being blocked, it could indicate a malicious file was executed without being detected. The .pdf and .txt files were also allowed, but PDFs and text files generally do not run code automatically (unless embedded scripts exist, which isn't indicated here). Thus, the allowed .dll is the most suspicious and worth investigating for malicious activity. 
The antivirus status shows some files were blocked (meaning the antivirus prevented them), but some files were allowed. 
Specifically: 
- At 11:27, a .dll file (dynamic-link library) was allowed at c:\temp. 
- DLL files can contain executable code, and if it was allowed without being blocked, it could indicate a malicious file was executed without being detected. 
The .pdf and .txt files were also allowed, but PDFs and text files generally do not run code automatically (unless embedded scripts exist, which isn't indicated here). 
Thus, the allowed .dll is the most suspicious and worth investigating for malicious activity. 
Question 3
A systems administrator wants to use existing resources to automate reporting from disparate security appliances that do not currently communicate. Which of the following is the best way to meet this objective? 
  1. Configuring an API Integration to aggregate the different data sets 
  2. Combining back-end application storage into a single, relational database 
  3. Purchasing and deploying commercial off the shelf aggregation software 
  4. Migrating application usage logs to on-premises storage 
Correct answer: A
Explanation:
The best way to automate reporting from disparate security appliances that do not currently communicate is to configure an API Integration to aggregate the different data sets. Interoperability: APIs allow different systems to communicate and share data, even if they were not originally designed to work together. This enables the integration of various security appliances into a unified reporting system. Automation: API integrations can automate the process of data collection, aggregation, and reporting, reducing manual effort and increasing efficiency. Scalability: APIs provide a scalable solution that can easily be extended to include additional security appliances or data sources as needed. 
The best way to automate reporting from disparate security appliances that do not currently communicate is to configure an API Integration to aggregate the different data sets. 
Interoperability: APIs allow different systems to communicate and share data, even if they were not originally designed to work together. This enables the integration of various security appliances into a unified reporting system. 
Automation: API integrations can automate the process of data collection, aggregation, and reporting, reducing manual effort and increasing efficiency. 
Scalability: APIs provide a scalable solution that can easily be extended to include additional security appliances or data sources as needed. 
Question 4
A developer needs to improve the cryptographic strength of a password-storage component in a web application without completely replacing the crypto-module. Which of the following is the most appropriate technique? 
  1. Key splitting 
  2. Key escrow 
  3. Key rotation 
  4. Key encryption 
  5. Key stretching 
Correct answer: E
Explanation:
The most appropriate technique to improve the cryptographic strength of a password-storage component in a web application without completely replacing the crypto-module is key stretching. Enhanced Security: Key stretching algorithms, such as PBKDF2, bcrypt, and scrypt, increase the computational effort required to derive the encryption key from the password, making brute-force attacks more difficult and time-consuming. Compatibility: Key stretching can be implemented alongside existing cryptographic modules, enhancing their security without the need for a complete overhaul. Industry Best Practices: Key stretching is a widely recommended practice for securely storing passwords, as it significantly improves resistance to password-cracking attacks. 
The most appropriate technique to improve the cryptographic strength of a password-storage component in a web application without completely replacing the crypto-module is key stretching. 
Enhanced Security: Key stretching algorithms, such as PBKDF2, bcrypt, and scrypt, increase the computational effort required to derive the encryption key from the password, making brute-force attacks more difficult and time-consuming. 
Compatibility: Key stretching can be implemented alongside existing cryptographic modules, enhancing their security without the need for a complete overhaul. Industry Best Practices: Key stretching is a widely recommended practice for securely storing passwords, as it significantly improves resistance to password-cracking attacks. 
Question 5
A company receives several complaints from customers regarding its website. An engineer implements a parser for the web server logs that generates the following output: 
Which of the following should the company implement to best resolve the issue? 
  1. IDS 
  2. CDN 
  3. WAF 
  4. NAC 
Correct answer: B
Explanation:
To improve global response times (e.g. India/Australia seeing multi-second load times) and offload traffic from your origin web servers, deploying a Content Delivery Network is the most effective solution. 
To improve global response times (e.g. India/Australia seeing multi-second load times) and offload traffic from your origin web servers, deploying a Content Delivery Network is the most effective solution. 
Question 6
A security officer received several complaints from users about excessive MPA push notifications at night. The security team investigates and suspects malicious activities regarding user account authentication. Which of the following is the best way for the security officer to restrict MFA notifications? 
  1. Provisioning FID02 devices 
  2. Deploying a text message based on MFA 
  3. Enabling OTP via email 
  4. Configuring prompt-driven MFA 
Correct answer: D
Explanation:
Excessive MFA push notifications can be a sign of an attempted push notification attack, where attackers repeatedly send MFA prompts hoping the user will eventually approve one by mistake. Configuring prompt-driven MFA: This option allows users to respond to prompts in a secure manner, often including features like time-limited approval windows, additional verification steps, or requiring specific actions to approve. This can help prevent users from accidentally approving malicious attempts. Configuring prompt-driven MFA is the best solution to restrict unnecessary MFA notifications and improve security. 
Excessive MFA push notifications can be a sign of an attempted push notification attack, where attackers repeatedly send MFA prompts hoping the user will eventually approve one by mistake. 
Configuring prompt-driven MFA: This option allows users to respond to prompts in a secure manner, 
often including features like time-limited approval windows, additional verification steps, or requiring specific actions to approve. This can help prevent users from accidentally approving malicious attempts. 
Configuring prompt-driven MFA is the best solution to restrict unnecessary MFA notifications and improve security. 
Question 7
A security professional is investigating a trend in vulnerability findings for newly deployed cloud systems. Given the following output: 
Which of the following actions would address the root cause of this issue? 
  1. Automating the patching system to update base Images 
  2. Recompiling the affected programs with the most current patches 
  3. Disabling unused/unneeded ports on all servers 
  4. Deploying a WAF with virtual patching upstream of the affected systems 
Correct answer: A
Explanation:
The output shows that multiple systems have outdated or vulnerable software versions (OpenSSL 1.01 and Java 11 runtime). This suggests that the systems are not being patched regularly or effectively. Automating the patching system to update base images: Automating the patching process ensures that the latest security updates and patches are applied to all systems, including newly deployed ones. This addresses the root cause by ensuring that base images used for deployment are always up-to-date with the latest security patches. 
The output shows that multiple systems have outdated or vulnerable software versions (OpenSSL 1.01 and Java 11 runtime). This suggests that the systems are not being patched regularly or effectively. 
Automating the patching system to update base images: Automating the patching process ensures that the latest security updates and patches are applied to all systems, including newly deployed ones. This addresses the root cause by ensuring that base images used for deployment are always up-to-date with the latest security patches. 
Question 8
Which of the following best describes the challenges associated with widespread adoption of homomorphic encryption techniques? 
  1. Incomplete mathematical primitives 
  2. No use cases to drive adoption 
  3. Quantum computers not yet capable 
  4. insufficient coprocessor support 
Correct answer: D
Explanation:
Homomorphic encryption allows computations to be performed on encrypted data without decrypting it, providing strong privacy guarantees. However, the adoption of homomorphic encryption is challenging due to several factors: Insufficient coprocessor support: The computational overhead of homomorphic encryption is significant, requiring substantial processing power. Current general-purpose processors are not optimized for the intensive computations required by homomorphic encryption, limiting its practical deployment. Specialized hardware or coprocessors designed to handle these computations more efficiently are not yet widely available. 
Homomorphic encryption allows computations to be performed on encrypted data without decrypting it, providing strong privacy guarantees. However, the adoption of homomorphic encryption is challenging due to several factors: 
Insufficient coprocessor support: The computational overhead of homomorphic encryption is significant, requiring substantial processing power. Current general-purpose processors are not optimized for the intensive computations required by homomorphic encryption, limiting its practical deployment. Specialized hardware or coprocessors designed to handle these computations more efficiently are not yet widely available. 
Question 9
After some employees were caught uploading data to online personal storage accounts, a company becomes concerned about data leaks related to sensitive, internal documentation. Which of the following would the company most likely do to decrease this type of risk? 
  1. Improve firewall rules to avoid access to those platforms. 
  2. Implement a cloud-access security broker 
  3. Create SIEM rules to raise alerts for access to those platforms 
  4. Deploy an internet proxy that filters certain domains 
Correct answer: B
Explanation:
A Cloud Access Security Broker (CASB) is a security policy enforcement point placed between cloud service consumers and cloud service providers to combine and interject enterprise security policies as cloud-based resources are accessed. Implement a cloud-access security broker: A CASB can provide visibility into cloud application usage, enforce data security policies, and protect against data leaks by monitoring and controlling access to cloud services. It also provides advanced features like data encryption, data loss prevention (DLP), and compliance monitoring. 
A Cloud Access Security Broker (CASB) is a security policy enforcement point placed between cloud service consumers and cloud service providers to combine and interject enterprise security policies as cloud-based resources are accessed. 
Implement a cloud-access security broker: A CASB can provide visibility into cloud application usage, enforce data security policies, and protect against data leaks by monitoring and controlling access to cloud services. It also provides advanced features like data encryption, data loss prevention (DLP), and compliance monitoring. 
Question 10
An organization wants to create a threat model to identity vulnerabilities in its infrastructure. Which of the following, should be prioritized first? 
  1. External-facing Infrastructure with known exploited vulnerabilities 
  2. Internal infrastructure with high-seventy and Known exploited vulnerabilities 
  3. External facing Infrastructure with a low risk score and no known exploited vulnerabilities 
  4. External-facing infrastructure with a high risk score that can only be exploited with local access to the resource 
Correct answer: A
Explanation:
When creating a threat model to identify vulnerabilities in an organization's infrastructure, prioritizing external-facing infrastructure with known exploited vulnerabilities is critical. Exposure to Attack: External-facing infrastructure is directly exposed to the internet, making it a primary target for attackers. Any vulnerabilities in this layer pose an immediate risk to the organization's security. Known Exploited Vulnerabilities: Vulnerabilities that are already known and exploited in the wild are of higher concern because they are actively being used by attackers. Addressing these vulnerabilities reduces the risk of exploitation significantly. Risk Mitigation: By prioritizing external-facing infrastructure with known exploited vulnerabilities, the organization can mitigate the most immediate and impactful threats, thereby improving overall security posture. 
When creating a threat model to identify vulnerabilities in an organization's infrastructure, prioritizing external-facing infrastructure with known exploited vulnerabilities is critical. 
Exposure to Attack: External-facing infrastructure is directly exposed to the internet, making it a primary target for attackers. Any vulnerabilities in this layer pose an immediate risk to the organization's security. 
Known Exploited Vulnerabilities: Vulnerabilities that are already known and exploited in the wild are of higher concern because they are actively being used by attackers. Addressing these vulnerabilities reduces the risk of exploitation significantly. 
Risk Mitigation: By prioritizing external-facing infrastructure with known exploited vulnerabilities, the organization can mitigate the most immediate and impactful threats, thereby improving overall security posture. 
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