[Aug 02, 2026] Uplift Your CS0-003 Exam Marks With The Help of CS0-003 Dumps [Q92-Q108]

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[Aug 02, 2026] Uplift Your CS0-003 Exam Marks With The Help of CS0-003 Dumps

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CompTIA CS0-003 Exam Syllabus Topics:

Section	Weight	Objectives
Vulnerability Management	34%	– Remediation and mitigation 1. Risk prioritization 2. Patch management – Vulnerability identification 1. Assessment of system weaknesses 2. Scanning tools and techniques
Security Operations	33%	– Monitoring security environments 1. Log analysis and interpretation 2. SIEM analysis and alerting – Threat intelligence usage 1. Threat actor profiling 2. Indicators of Compromise (IoCs)
Incident Response and Management	33%	– Reporting and communication 1. Stakeholder communication 2. Incident documentation – Incident handling lifecycle 1. Detection and analysis 2. Containment, eradication, recovery

Section

Weight

Objectives

Vulnerability Management

34%

– Remediation and mitigation

1. Risk prioritization
2. Patch management

– Vulnerability identification

1. Assessment of system weaknesses
2. Scanning tools and techniques

Security Operations

33%

– Monitoring security environments

1. Log analysis and interpretation
2. SIEM analysis and alerting

– Threat intelligence usage

1. Threat actor profiling
2. Indicators of Compromise (IoCs)

Incident Response and Management

33%

– Reporting and communication

1. Stakeholder communication
2. Incident documentation

– Incident handling lifecycle

1. Detection and analysis
2. Containment, eradication, recovery

Q92. A security analyst is reviewing a recent vulnerability scan report for a new server infrastructure. The analyst would like to make the best use of time by resolving the most critical vulnerability first. The following information is provided:

Which of the following should the analyst concentrate remediation efforts on first?

SVR01

SVR02

SVR03

SVR04

SVR02 has a CVSS score of 7.1 and is exploitable, making it the highest priority for remediation.
* SVR01 (CVSS 8.9) is not exploitable, so it is a lower risk.
* SVR03 (CVSS 3.5) is exploitable but has a lower severity than SVR02.
* SVR04 (CVSS 6.7) is not exploitable, reducing its urgency.
Thus, B (SVR02) is the correct answer, as it presents the highest immediate risk.

Q93. An analyst investigated a website and produced the following:
Which of the following syntaxes did the analyst use to discover the application versions on this vulnerable website?

nmap -sS -T4 -F insecure.org

nmap -o insecure.org

nmap -sV -T4 -F insecure.org

nmap -A insecure.org

Q94. A zero-day command injection vulnerability was published. A security administrator is analyzing the following logs for evidence of adversaries attempting to exploit the vulnerability:

Which of the following log entries provides evidence of the attempted exploit?

Log entry 1

Log entry 2

Log entry 3

Log entry 4

Log entry 4 shows an attempt to exploit the zero-day command injection vulnerability by appending a malicious command (;cat /etc/passwd) to the end of a legitimate request (/cgi-bin/index.cgi?name=John). This command would try to read the contents of the /etc/passwd file, which contains user account information, and could lead to further compromise of the system. The other log entries do not show any signs of command injection, as they do not contain any special characters or commands that could alter the intended behavior of the application. Official References:
https://www.imperva.com/learn/application-security/command-injection/
https://www.zerodayinitiative.com/advisories/published/

Q95. An organization was compromised, and the usernames and passwords of all em-ployees were leaked online.
Which of the following best describes the remedia-tion that could reduce the impact of this situation?

Multifactor authentication

Password changes

System hardening

Password encryption

Multifactor authentication (MFA) is a security method that requires users to provide two or more pieces of evidence to verify their identity, such as a password, a PIN, a fingerprint, or a one-time code. MFA can reduce the impact of a credential leak because even if the attackers have the usernames and passwords of the employees, they would still need another factor to access the organization’s systems and resources. Password changes, system hardening, and password encryption are also good security practices, but they do not address the immediate threat of compromised credentials.

Q96. During an incident, a security analyst discovers a large amount of Pll has been emailed externally from an employee to a public email address. The analyst finds that the external email is the employee’s personal email. Which of the following should the analyst recommend be done first?

Place a legal hold on the employee’s mailbox.

Enable filtering on the web proxy.

Disable the public email access with CASB.

Configure a deny rule on the firewall.

Placing a legal hold on the employee’s mailbox is the best action to perform first, as it preserves all mailbox content, including deleted items and original versions of modified items, for potential legal or forensic purposes. A legal hold is a feature that allows an administrator to retain mailbox data for a user indefinitely or for a specified period, regardless of the user’s actions or retention policies. A legal hold can be applied to a mailbox using Litigation Hold or In-Place Hold in Exchange Server or Exchange Online. A legal hold can help to ensure that evidence of data exfiltration or other malicious activities is not lost or tampered with, and that the organization can comply with any legal or regulatory obligations.

Q97. An incident response team is working with law enforcement to investigate an active web server compromise. The decision has been made to keep the server running and to implement compensating controls for a period of time. The web service must be accessible from the internet via the reverse proxy and must connect to a database server. Which of the following compensating controls will help contain the adversary while meeting the other requirements?
(Choose two).

Drop the tables on the database server to prevent data exfiltration.

Deploy EDR on the web server and the database server to reduce the adversary’s capabilities.

Stop the httpd service on the web server so that the adversary can not use web exploits.

Use microsegmentation to restrict connectivity to/from the web and database servers.

Comment out the HTTP account in the /etc/passwd file of the web server.

Move the database from the database server to the web server.

Deploying EDR on the web server and the database server to reduce the adversaries capabilities and using micro segmentation to restrict connectivity to/from the web and database servers are two compensating controls that will help contain the adversary while meeting the other requirements. A compensating control is a security measure that is implemented to mitigate the risk of a vulnerability or an attack when the primary control is not feasible or effective. EDR stands for Endpoint Detection and Response, which is a tool that monitors endpoints for malicious activity and provides automated or manual response capabilities. EDR can help contain the adversary by detecting and blocking their actions, such as data exfiltration, lateral movement, privilege escalation, or command execution. Micro segmentation is a technique that divides a network into smaller segments based on policies and rules, and applies granular access controls to each segment. Micro segmentation can help contain the adversary by isolating the web and database servers from other parts of the network, and limiting the traffic that can flow between them.

Q98. A security analyst needs to develop a solution to protect a high-value asset from an exploit like a recent zero- day attack. Which of the following best describes this risk management strategy?

Avoid

Transfer

Mitigate

Comprehensive Detailed Explanation:The best approach to address the risk of a zero-day attack is mitigation.
Here’s an explanation of each option:
* A. Avoid
* Explanation: Avoiding risk would mean discontinuing the use of the asset, which is not feasible for high-value assets that are essential to operations.
* B. Transfer
* Explanation: Transferring risk would involve outsourcing or obtaining insurance, but this does not directly reduce the threat of a zero-day exploit.
* C. Accept
* Explanation: Accepting the risk means acknowledging it without implementing countermeasures, which is not advisable for high-value assets at risk from sophisticated attacks.
* D. Mitigate
* Explanation: Mitigation involves implementing technical or administrative controls to reduce the impact of an attack. For zero-day exploits, this could include installing network-based protections, enhancing monitoring, or applying threat intelligence to detect or contain potential exploit attempts.
References:
* NIST SP 800-30: Guide for Conducting Risk Assessments.
* OWASP Risk Rating Methodology: Techniques for assessing and mitigating security risks.

Q99. A company discovers that its proprietary information is being sold on the dark web.
A security analyst uses threat hunting to search for signs of compromise.
After running a network packet capture tool, the analyst identifies millions of packets similar to the following:
Internet Protocol Version 4, src: 192.168.1.2, dst: 104.21.75.76
Internet Control Message Protocol
Type: 8 Echo request
Code: 0
Checksum: 0x34db [correct]
Sequence number: 3362
No response seen
Data: 64 bytes
Data payload: 0e1bS8…157ea2054af44…9865b34857a05…24b45824…
The analyst does not detect or identify any other abnormalities. Which of the following is most likely the malicious activity in this scenario?

An insider is using an IP command-and-control channel to sell proprietary information.

A threat actor is performing exfiltration over an alternative protocol.

A machine was infected with a virus that is trying to propagate.

A hacktivist is conducting an ICMP DDoS attack against the company.

The correct answer is B because the packet capture shows ICMP echo request traffic carrying data in the packet payload. ICMP echo requests are normally used for ping-style connectivity checks, not for transferring business data. The presence of millions of ICMP packets with payload data, combined with the fact that proprietary information is already appearing on the dark web, strongly indicates data exfiltration over an alternative protocol , often described as ICMP tunneling or protocol misuse.
The official CompTIA CySA+ CS0-003 objectives place this directly under Security Operations , specifically analyzing indicators of potentially malicious activity and using packet capture tools. The objectives explicitly include data exfiltration , unexpected outbound communication , packet capture , Wireshark , and tcpdump as relevant skills and tools for determining malicious activity.
Supporting extract from the CySA+ Study Guide: ICMP echo requests are produced by ping, and “Ping communications take place using the Internet Control Message Protocol (ICMP).” This confirms that the observed Type 8 echo request traffic is ICMP ping-style traffic, not a normal file-transfer or application protocol.
Supporting extract from the Secbay CySA+ guide: “Data Exfiltration: Unauthorized transfer of sensitive data from a system, potentially indicating a data breach or insider threat activity.” The same section also states that
“Unexpected Outbound Communication” can indicate communication with malicious or unauthorized entities.
Why the other options are incorrect:
A is not the best answer because the evidence does not prove an insider or a command-and-control channel.
The packet capture shows ICMP echo requests with data payloads, which points more directly to exfiltration.
C is incorrect because there is no evidence of malware propagation, scans, sweeps, or attempts to infect other systems.
D is incorrect because an ICMP DDoS would normally involve traffic intended to overwhelm a target. Here, the key indicator is data being carried inside ICMP echo request packets, and the business context is stolen proprietary information on the dark web.
Therefore, the most likely malicious activity is exfiltration over an alternative protocol .

Q100. A company has the following security requirements:
. No public IPs
All data secured at rest
. No insecure ports/protocols
After a cloud scan is completed, a security analyst receives reports that several misconfigurations are putting the company at risk. Given the following cloud scanner output:

Which of the following should the analyst recommend be updated first to meet the security requirements and reduce risks?

VM_PRD_DB

VM_DEV_DB

VM_DEV_Web02

VM_PRD_Web01

This VM has a public IP and an open port 80, which violates the company’s security requirements of no public IPs and no insecure ports/protocols. It also exposes the VM to potential attacks from the internet. This VM should be updated first to use a private IP and close the port 80, or use a secure protocol such as HTTPS.
References[CompTIA CySA+ Study Guide: Exam CS0-003, 3rd Edition], Chapter 2: Cloud and Hybrid Environments, page 67.[What is a Public IP Address?][What is Port 80?]

Q101. Which of the following security operations tasks are ideal for automation?

Suspicious file analysis:

Firewall IoC block actions:
Examine the firewall logs for IoCs from the most recently published zero-day exploit Take mitigating actions in the firewall to block the behavior found in the logs Follow up on any false positives that were caused by the block rules

Security application user errors:
Search the error logs for signs of users having trouble with the security application Look up the user’s phone number Call the user to help with any questions about using the application

Email header analysis:
Check the email header for a phishing confidence metric greater than or equal to five Add the domain of sender to the block list Move the email to quarantine

Email header analysis is one of the security operations tasks that are ideal for automation. Email header analysis involves checking the email header for various indicators of phishing or spamming attempts, such as sender address spoofing, mismatched domains, suspicious subject lines, or phishing confidence metrics. Email header analysis can be automated using tools or scripts that can parse and analyze email headers and take appropriate actions based on predefined rules or thresholds

Q102. The most recent vulnerability scan results show the following

The vulnerability team learned the following from the asset owners:
* Server hqfinoi is a financial transaction database server used in the company ‘ s largest business unit.
* Server hqadmin02 is utilized by an end user with administrator privileges to several critical applications.
* No compensating controls exist for either issue.
Which of the following would the vulnerability team most likely do to determine remediation prioritization?

Review the BCP and prioritize the remediation of the asset that would take more time to bring online for operational use.

Contact the network and desktop engineering teams to discuss prioritizing the asset that Is faster to remediate.

Reference the BIA to determine the value designation and prioritize vulnerability remediation of the more critical asset.

Identify the network placement and configuration of each asset, then prioritize the asset with the least recent backups.

When two vulnerabilities are both high severity (CVSS 8.1 and 8.5) and no compensating controls exist, the deciding factor for remediation prioritization becomes business impact and asset criticality/value (what matters most to the organization if compromised or taken offline for remediation).
That is exactly what a Business Impact Analysis (BIA) is used for: it is a formalized method to determine asset criticality/value designations and to prioritize response/remediation work based on business impact.
Supporting exact extracts:
* The Secbay Press CS0-003 guide explicitly states that Business Impact Analysis is used to align vulnerability prioritization with critical business functions:Exact extract (Secbay Press): “Business Impact Analysis: … Considers the potential impact of vulnerabilities on critical business functions …
prioritizing vulnerabilities that could impact core business processes.”
* It also describes the vulnerability prioritization process as combining severity/exploitability with asset criticality assessment (which is informed by business owners and BIA outputs):Exact extract (Secbay Press): “Asset Criticality Assessment: Evaluate the criticality of assets affected… Consider the importance of assets in business operations, data sensitivity, and regulatory compliance.”
* The All-in-One CS0-003 guide reinforces that asset value (sensitivity + criticality) is one of the most important drivers of remediation timing/prioritization:Exact extract (All-in-One Exam Guide): “Asset value is… one of the most important factors in determining how quickly you should remediate vulnerabilities…” and asset value is tied to “sensitivity and criticality.” Applying this to the scenario
* HQFIN01 supports financial transactions for the largest business unit # typically extremely high criticality (availability) and often high sensitivity/integrity requirements.
* HQADMIN02 is used by a privileged user and could be high risk too (admin access), but the question asks what the team would do to determine prioritization: the correct step is to reference BIA/value designation and then prioritize based on which asset is more critical to business operations.
Why the other options are incorrect
* A (Review BCP and patch what takes longer to bring online): BCP/DR planning is not the primary method for vulnerability remediation ranking; prioritization is risk-based and commonly driven by asset criticality/business impact (BIA), not “time to bring online.”
* B (Fix the faster one first): Speed of remediation is not the main driver; risk reduction and business impact are.
* D (Least recent backups): Backup recency matters for recovery and resilience, but it’s not the primary determinant for vulnerability remediation priority versus asset criticality and business impact.
References (CompTIA CySA+ CS0-003 documents / study guides used):
* Secbay Press, CompTIA CySA+ Exam Prep Guide (CS0-003): BIA used to prioritize vulnerabilities impacting critical business functions; asset criticality assessment in prioritization process
* Mya Heath et al., CompTIA CySA+ All-in-One Exam Guide (CS0-003): asset value (sensitivity + criticality) drives how quickly vulnerabilities should be remediated

Q103. Executives at an organization email sensitive financial information to external business partners when negotiating valuable contracts. To ensure the legal validity of these messages, the cybersecurity team recommends a digital signature be added to emails sent by the executives.
Which of the following are the primary goals of this recommendation? (Choose two.)

Confidentiality

Integrity

Privacy

Anonymity

Non-repudiation

Authorization

Digital signatures ensure the integrity and non-repudiation of emails. Integrity ensures that the message has not been altered in transit, as the digital signature would be invalidated if the content were tampered with. Non-repudiation ensures that the sender cannot deny having sent the email, as the digital signature is unique to their identity.

Q104. SIMULATION
The developers recently deployed new code to three web servers. A daily automated external device scan report shows server vulnerabilities that are failing items according to PCI DSS.
If the vulnerability is not valid, the analyst must take the proper steps to get the scan clean.
If the vulnerability is valid, the analyst must remediate the finding.
After reviewing the information provided in the network diagram, select the STEP 2 tab to complete the simulation by selecting the correct Validation Result and Remediation Action for each server listed using the drop-down options.
Instructions
STEP 1: Review the information provided in the network diagram.
STEP 2: Given the scenario, determine which remediation action is required to address the vulnerability.
If at any time you would like to bring back the initial state of the simulation, please select the Reset All button.

Web Server 01 – True Positive – Encrypt Entire Session
Web Server 02 – True Positive – Submit as a non-issue
Web Server 03 – True Positive – Request Certificate from a Public CA

Q105. Due to reports of unauthorized activity that was occurring on the internal network, an analyst is performing a network discovery. The analyst runs an Nmap scan against a corporate network to evaluate which devices were operating in the environment. Given the following output:

Which of the following choices should the analyst look at first?

wh4dc-748gy.lan (192.168.86.152)

lan (192.168.86.22)

imaging.lan (192.168.86.150)

xlaptop.lan (192.168.86.249)

p4wnp1_aloa.lan (192.168.86.56)

The analyst should look at p4wnp1_aloa.lan (192.168.86.56) first, as this is the most suspicious device on the network. P4wnP1 ALOA is a tool that can be used to create a malicious USB device that can perform various attacks, such as keystroke injection, network sniffing, man-in-the-middle, or backdoor creation. The presence of a device with this name on the network could indicate that an attacker has plugged in a malicious USB device to a system and gained access to the network. Official References: https://github.com/mame82
/P4wnP1_aloa

Q106. A security analyst is working on a server patch management policy that will allow the infrastructure team to be informed more quickly about new patches. Which of the following would most likely be required by the infrastructure team so that vulnerabilities can be remediated quickly? (Select two).

Hostname

Missing KPI

CVE details

POC availability

loCs

npm identifier

CVE details and IoCs are information that would most likely be required by the infrastructure team so that vulnerabilities can be remediated quickly. CVE details provide the description, severity, impact, and solution of the vulnerabilities that affect the servers. IoCs are indicators of compromise that help identify and respond to potential threats or attacks on the servers. Reference: Server and Workstation Patch Management Policy, Section: Policy; Patch Management Policy: Why You Need One in 2024, Section: What is a patch management policy?

Q107. The security operations team is required to consolidate several threat intelligence feeds due to redundant tools and portals. Which of the following will best achieve the goal and maximize results?

Single pane of glass

Single sign-on

Data enrichment

Deduplication

Deduplication is a process that involves removing any duplicate or redundant data or information from a data set or source. Deduplication can help consolidate several threat intelligence feeds by eliminating any overlapping or repeated indicators of compromise (IoCs), alerts, reports, or recommendations. Deduplication can also help reduce the volume and complexity of threat intelligence data, as well as improve its quality, accuracy, or relevance.

Q108. A company’s security team is updating a section of the reporting policy that pertains to inappropriate use of resources (e.g., an employee who installs cryptominers on workstations in the office). Besides the security team, which of the following groups should the issue be escalated to first in order to comply with industry best practices?

Help desk

Law enforcement

Legal department

Board member

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