CompTIA CS0-003 Exam Actual Questions
CompTIA CySA+ (CS0-003) (Page 2 )

Updated On: 13-Jun-2026

A recent zero-day vulnerability is being actively exploited, requires no user interaction or privilege escalation, and has a significant impact to confidentiality and integrity but not to availability. Which of the following CVE metrics would be most accurate for this zero-day threat?

  1. CVSS:31/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
  2. CVSS:31/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:L
  3. CVSS:31/AV:N/AC:L/PR:N/UI:H/S:U/C:L/I:N/A:H
  4. CVSS:31/AV:L/AC:L/PR:R/UI:R/S:U/C:H/I:L/A:H

Answer(s): A

Explanation:

Option A is correct because the vulnerability requires no user interaction (UI:N), no privilege escalation (PR:N), and has high impact to confidentiality and integrity (C:H, I:H) with limited availability impact (A:L). It also uses the typical AV:N and AC:L, with S:U for an unchanged scope, matching a critical, user-independent exploit affecting confidentiality and integrity.
B is incorrect: PR:H and UI:R imply need for user interaction and high privileges, contradicting the stated no user interaction and no privilege escalation. Availability impact remains A:L, but the access conditions are inconsistent with the scenario.
C is incorrect: UI:H indicates required user interaction, which contradicts the no user interaction condition. PR:N is correct, but UI:H makes it invalid for the given case.
D is incorrect: AV:L (network access not true in scenario), and UI:R suggests user interaction and higher privilege requirements, which do not align with the zero-click, no-privilege-exploitation described. Also A:H suggests high availability impact, which contradicts the given lack of availability impact.



Which of the following tools would work best to prevent the exposure of PII outside of an organization?

  1. PAM
  2. IDS
  3. PKI
  4. DLP

Answer(s): D

Explanation:

Option D is correct because DLP (Data Loss Prevention) is designed to detect and prevent transmission of sensitive PII outside the organization, enforcing data handling policies and filtering or blocking exfiltration attempts. A) PAM (Privileged Access Management) manages privileged credentials, not data exfiltration. B) IDS (Intrusion Detection System) detects suspicious activity but does not specifically prevent outbound exposure of PII. C) PKI (Public Key Infrastructure) enables encryption and authentication, but it does not by itself enforce data loss prevention policies. Therefore DLP best addresses protecting PII from egress outside the organization.



An organization conducted a web application vulnerability assessment against the corporate website, and the following output was observed:



Which of the following tuning recommendations should the security analyst share?

  1. Set an HttpOnly flag to force communication by HTTPS
  2. Block requests without an X-Frame-Options header
  3. Configure an Access-Control-Allow-Origin header to authorized domains
  4. Disable the cross-origin resource sharing header

Answer(s): C

Explanation:

Option C is correct because configuring Access-Control-Allow-Origin to authorized domains mitigates unauthorized cross-origin requests, reducing data exposure and enforcing proper CORS policy for a web application.
A) Incorrect — HttpOnly flags protect cookies from client-side access but do not govern cross-origin requests or CORS behavior.
B) Incorrect — X-Frame-Options prevents clickjacking by restricting framing, not cross-origin resource sharing access, and isn’t focused on allowed origins.
D) Incorrect — Disabling CORS would broaden access; the recommendation is to enforce a controlled allow list, not remove headers.



Which of the following items should be included in a vulnerability scan report? (Choose two.)

  1. Lessons learned
  2. Service-level agreement
  3. Playbook
  4. Affected hosts
  5. Risk score
  6. Education plan

Answer(s): D,E

Explanation:

Option D is correct because a vulnerability scan report must identify affected hosts to indicate where vulnerabilities exist. Option E is correct because a risk score quantifies the severity and prioritization of findings, guiding remediation.
A) Incorrect — Lessons learned belong to post-incident or project retrospectives, not standard vulnerability scan results.
B) Incorrect — Service-level agreement is a contractual metric, not a scan output.
C) Incorrect — Playbook documents procedures; it’s not a direct scan finding.
F) Incorrect — Education plan is a remediation or training artifact, not a scan result.



The Chief Executive Officer of an organization recently heard that exploitation of new attacks in the industry was happening approximately 45 days after a patch was released. Which of the following would best protect

this organization?

  1. A mean time to remediate of 30 days
  2. A mean time to detect of 45 days
  3. A mean time to respond of 15 days
  4. Third-party application testing

Answer(s): A

Explanation:

Option A is correct because reducing mean time to remediate (MTTR) to 30 days helps ensure patches and fixes are applied quickly, mitigating the 45-day exploitation window after patch release. This aligns with risk management by closing vulnerability gaps faster than attackers exploit them.
B is incorrect because mean time to detect (MTTD) of 45 days would allow attackers to dwell for a long period before discovery, increasing risk. C is incorrect because mean time to respond (MTTRsp) of 15 days focuses on incident handling after detection, not closing the patching window. D is incorrect because third-party application testing improves vulnerability discovery but does not directly shorten remediation after patch release.



A security analyst recently joined the team and is trying to determine which scripting language is being used in a production script to determine if it is malicious. Given the following script:



Which of the following scripting languages was used in the script?

  1. PowerShell
  2. Ruby
  3. Python
  4. Shell script

Answer(s): A

Explanation:

Option A is correct because the script syntax and cmdlets indicate Windows PowerShell usage, a common tool for automation and post-exploitation in Windows environments.
B) Incorrect — Ruby syntax, including distinct gem usage and English-like method calls, is not evidenced in the script.
C) Incorrect — Python would show Pythonic syntax (def, indentation, import statements) which are not present.
D) Incorrect — Shell script uses sh/bash syntax with shebang and POSIX commands; not consistent with PowerShell-specific features.



A company's user accounts have been compromised. Users are also reporting that the company's internal portal is sometimes only accessible through HTTP, other times; it is accessible through HTTPS. Which of the following most likely describes the observed activity?

  1. There is an issue with the SSL certificate causing port 443 to become unavailable for HTTPS access
  2. An on-path attack is being performed by someone with internal access that forces users into port 80
  3. The web server cannot handle an increasing amount of HTTPS requests so it forwards users to port 80
  4. An error was caused by BGP due to new rules applied over the company's internal routers

Answer(s): B

Explanation:

Option B is correct because an on-path attacker with internal access can manipulate traffic to force users to HTTP (port 80) to intercept credentials or sessions, causing inconsistent portal access between HTTP and HTTPS.
A) Incorrect — SSL certificate issues would primarily affect HTTPS availability or trust, not alternating port usage driven by an attacker.
C) Incorrect — A web server do not typically “forward” users from HTTPS to HTTP as a normal behavior; such redirection would be controlled, not intermittent due to capacity.
D) Incorrect — BGP-related router policy changes would affect routing, not selectively toggle HTTP/HTTPS access on internal portals.



A security analyst is tasked with prioritizing vulnerabilities for remediation. The relevant company security policies are shown below:

Security Policy 1006: Vulnerability Management
1. The Company shall use the CVSSv3.1 Base Score Metrics (Exploitability and Impact) to prioritize the

remediation of security vulnerabilities.
2. In situations where a choice must be made between confidentiality and availability, the Company shall prioritize confidentiality of data over availability of systems and data.
3. The Company shall prioritize patching of publicly available systems and services over patching of internally available system.

According to the security policy, which of the following vulnerabilities should be the highest priority to patch?

  1. Name: THOR.HAMMER
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Internal System
  2. Name: CAP.SHIELD
    CVSS 3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    External System
  3. Name: LOKI.DAGGER
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    External System
  4. Name: THANOS.GAUNTLET
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    Internal System

Answer(s): B

Explanation:

Option B is correct because policy 1 uses CVSSv3.1 Base Scores to prioritize, and policy 3 requires patching publicly available systems over internally available ones. External systems with C:H/I:N/A:N (high impact on confidentiality, no impact on integrity/availability) and external publicly accessible rating should be prioritized, but the highest priority is the external system with confidentiality impact high and availability not affected (C:H). Among choices, CAP.SHIELD corresponds to that external high-confidentiality, external system, external system with C:H/I:N/A:N, matching policy ranking.
A) Incorrect — THOR.HAMMER not identified as the highest-priority external system with high confidentiality.
C) Incorrect — LOKI.DAGGER is external but lacks the strongest confidentiality impact given the policy.
D) Incorrect — THANOS.GAUNTLET internal or not matching the highest-priority external high-confidentiality system.



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