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Certified Secure Software Lifecycle Professional (CSSLP) Certification: Evaluate Scope & Value for Secure Software Development

Understand the ISC2 CSSLP credential for embedding security across the entire software development lifecycle.

The Certified Secure Software Lifecycle Professional (CSSLP) certification from ISC2 validates expertise in integrating security into every phase of software development. Explore detailed exam coverage, experience prerequisites, and renewal policies. Understand how CSSLP supports roles in application security, product security, and DevSecOps, helping professionals influence secure design and implementation across the software supply chain.

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Credential overview

Understanding the ISC2 Certified Secure Software Lifecycle Professional (CSSLP)

CSSLP is an ISC2 secure software lifecycle certification for professionals who build security into requirements, architecture, implementation, testing, deployment, and supply chains.

CSSLP adds strong coverage for application security and software supply-chain SEO. It creates internal links to roles such as application security engineer, product security engineer, software architect, DevSecOps engineer, and security champion, and it pairs naturally with OWASP, cloud, and secure development content.

Application SecuritySecure SDLCSoftware SecurityDevSecOpsSupply Chain SecurityCybersecurity

Who should take it

Take CSSLP if you help shape software security practices beyond a single tool or testing phase. It is a good fit for professionals who want to prove they can integrate security into how software is planned, designed, built, tested, released, operated, and retired.

Best for

CSSLP fits experienced software, application security, product security, and DevSecOps professionals who influence how software is designed and delivered. It is strongest for people who work across requirements, architecture, code, testing, deployment, operations, and third-party software risk rather than only one scanner or vulnerability workflow.

Why it matters

CSSLP is valuable where employers need proof that a professional understands secure software as a lifecycle discipline. It can support application security, product security, secure SDLC, DevSecOps, architecture, and software assurance roles.

Requirements

ISC2 requires four years of cumulative full-time experience in one or more CSSLP domains. A relevant bachelor or master degree in computer science, IT, or a related field may satisfy up to one year. Candidates who pass before meeting the requirement can follow the Associate of ISC2 path.

Best fit

Who ISC2 Certified Secure Software Lifecycle Professional (CSSLP) is best suited for

CSSLP fits experienced software, application security, product security, and DevSecOps professionals who influence how software is designed and delivered. It is strongest for people who work across requirements, architecture, code, testing, deployment, operations, and third-party software risk rather than only one scanner or vulnerability workflow.

Who should take it

Take CSSLP if you help shape software security practices beyond a single tool or testing phase. It is a good fit for professionals who want to prove they can integrate security into how software is planned, designed, built, tested, released, operated, and retired.

Best for

CSSLP fits experienced software, application security, product security, and DevSecOps professionals who influence how software is designed and delivered. It is strongest for people who work across requirements, architecture, code, testing, deployment, operations, and third-party software risk rather than only one scanner or vulnerability workflow.

Career value

Career value of ISC2 Certified Secure Software Lifecycle Professional (CSSLP)

CSSLP can support advancement in application security, product security, software assurance, DevSecOps, architecture, and secure development leadership. It is most powerful when the candidate can show real influence over software lifecycle practices.

CSSLP is valuable where employers need proof that a professional understands secure software as a lifecycle discipline. It can support application security, product security, secure SDLC, DevSecOps, architecture, and software assurance roles.

Learning outcomes

Certified Secure Software Lifecycle Professional CSSLP Exam Topics and Skills

The CSSLP exam evaluates proficiency across eight critical domains, ranging from secure requirements gathering to deployment, operations, and supply chain integrity. Review these core objectives to gauge your current readiness and identify specific areas needing deeper technical study.

  • Apply secure software concepts across confidentiality, integrity, availability, authentication, authorization, and accountability.
  • Integrate security into software lifecycle management, requirements, and architecture decisions.
  • Evaluate secure implementation, testing, deployment, operations, and maintenance practices.
  • Address software supply-chain risk and third-party dependency concerns.
  • Communicate secure SDLC expectations across engineering, security, and governance teams.

Tags and keywords

Certification tags and search topics

Application SecuritySecure SDLCSoftware SecurityDevSecOpsSupply Chain SecurityCybersecurityISC2 CSSLP certificationCSSLP examCertified Secure Software Lifecycle Professionalsecure SDLC certificationapplication security certificationCSSLP requirementsCSSLP cost

Reference

Quick facts

Provider
ISC2
Code
CSSLP
Level
Specialty
Credential type
Professional certification
Active exams
1
Known price
$599
Study time
80-160h
Last verified
Jun 16, 2026
Register

Provider

ISC2

ISC2

Professional association

Exam details

Certified Secure Software Lifecycle Professional CSSLP Exam Structure and Format

The Certified Secure Software Lifecycle Professional exam consists of 125 multiple-choice and advanced items. Candidates are provided with a three-hour time limit to complete the written assessment, which is delivered through in-person testing centers to ensure integrity.

CSSLP

Certified Secure Software Lifecycle Professional Exam

Multiple-choice and advanced item questions.

Official exam
Type
Written
Delivery
In person
Duration
180 min
Questions
125

Passing score: 700 Scaled score out of 1000

Exam sections

01

Secure Software Concepts

The Secure Software Concepts section covers secure development practices, requirements, design review, implementation controls, testing evidence, release governance, dependency risk, and operational maintenance across the software lifecycle. For Certified Secure Software Lifecycle Professional, this domain is normally tested through professional security judgment: candidates need to connect terminology with risk, architecture, control effectiveness, governance, and operational consequences across realistic enterprise environments.

10% Weight
Question notes

Weight: about 10% of the exam content for this certification. ISC2 questions commonly use scenario-based wording and may require choosing the most appropriate, most complete, or best-risk-aligned answer from several plausible options. For Secure Software Concepts, expect software lifecycle, application security, testing, and deployment scenarios, with questions that may blend this objective with neighboring exam areas instead of isolating it as a standalone topic.

Preparation tips

When preparing for Secure Software Concepts, use the official ISC2 exam outline as the checklist, then study enough surrounding context to explain why a control, design, policy, or operational action is appropriate in a specific scenario. Follow a feature or application from requirements through design, coding, testing, release, operations, and maintenance, noting security evidence and decision gates at each step. Spend extra time on applied scenarios, because higher-level questions usually reward judgment, sequencing, and tradeoff analysis.

02

Secure Software Lifecycle Management

The Secure Software Lifecycle Management section covers secure development practices, requirements, design review, implementation controls, testing evidence, release governance, dependency risk, and operational maintenance across the software lifecycle. For Certified Secure Software Lifecycle Professional, this domain is normally tested through professional security judgment: candidates need to connect terminology with risk, architecture, control effectiveness, governance, and operational consequences across realistic enterprise environments.

10% Weight
Question notes

Weight: about 10% of the exam content for this certification. ISC2 questions commonly use scenario-based wording and may require choosing the most appropriate, most complete, or best-risk-aligned answer from several plausible options. For Secure Software Lifecycle Management, expect software lifecycle, application security, testing, and deployment scenarios, with questions that may blend this objective with neighboring exam areas instead of isolating it as a standalone topic.

Preparation tips

When preparing for Secure Software Lifecycle Management, use the official ISC2 exam outline as the checklist, then study enough surrounding context to explain why a control, design, policy, or operational action is appropriate in a specific scenario. Follow a feature or application from requirements through design, coding, testing, release, operations, and maintenance, noting security evidence and decision gates at each step. Spend extra time on applied scenarios, because higher-level questions usually reward judgment, sequencing, and tradeoff analysis.

03

Secure Software Requirements

The Secure Software Requirements section covers secure development practices, requirements, design review, implementation controls, testing evidence, release governance, dependency risk, and operational maintenance across the software lifecycle. For Certified Secure Software Lifecycle Professional, this domain is normally tested through professional security judgment: candidates need to connect terminology with risk, architecture, control effectiveness, governance, and operational consequences across realistic enterprise environments.

14% Weight
Question notes

Weight: about 14% of the exam content for this certification. ISC2 questions commonly use scenario-based wording and may require choosing the most appropriate, most complete, or best-risk-aligned answer from several plausible options. For Secure Software Requirements, expect software lifecycle, application security, testing, and deployment scenarios, with questions that may blend this objective with neighboring exam areas instead of isolating it as a standalone topic.

Preparation tips

When preparing for Secure Software Requirements, use the official ISC2 exam outline as the checklist, then study enough surrounding context to explain why a control, design, policy, or operational action is appropriate in a specific scenario. Follow a feature or application from requirements through design, coding, testing, release, operations, and maintenance, noting security evidence and decision gates at each step. Spend extra time on applied scenarios, because higher-level questions usually reward judgment, sequencing, and tradeoff analysis.

04

Secure Software Architecture and Design

The Secure Software Architecture and Design section covers secure development practices, requirements, design review, implementation controls, testing evidence, release governance, dependency risk, and operational maintenance across the software lifecycle. For Certified Secure Software Lifecycle Professional, this domain is normally tested through professional security judgment: candidates need to connect terminology with risk, architecture, control effectiveness, governance, and operational consequences across realistic enterprise environments.

14% Weight
Question notes

Weight: about 14% of the exam content for this certification. ISC2 questions commonly use scenario-based wording and may require choosing the most appropriate, most complete, or best-risk-aligned answer from several plausible options. For Secure Software Architecture and Design, expect software lifecycle, application security, testing, and deployment scenarios, with questions that may blend this objective with neighboring exam areas instead of isolating it as a standalone topic.

Preparation tips

When preparing for Secure Software Architecture and Design, use the official ISC2 exam outline as the checklist, then study enough surrounding context to explain why a control, design, policy, or operational action is appropriate in a specific scenario. Follow a feature or application from requirements through design, coding, testing, release, operations, and maintenance, noting security evidence and decision gates at each step. Spend extra time on applied scenarios, because higher-level questions usually reward judgment, sequencing, and tradeoff analysis.

05

Secure Software Implementation

The Secure Software Implementation section covers secure development practices, requirements, design review, implementation controls, testing evidence, release governance, dependency risk, and operational maintenance across the software lifecycle. For Certified Secure Software Lifecycle Professional, this domain is normally tested through professional security judgment: candidates need to connect terminology with risk, architecture, control effectiveness, governance, and operational consequences across realistic enterprise environments.

14% Weight
Question notes

Weight: about 14% of the exam content for this certification. ISC2 questions commonly use scenario-based wording and may require choosing the most appropriate, most complete, or best-risk-aligned answer from several plausible options. For Secure Software Implementation, expect software lifecycle, application security, testing, and deployment scenarios, with questions that may blend this objective with neighboring exam areas instead of isolating it as a standalone topic.

Preparation tips

When preparing for Secure Software Implementation, use the official ISC2 exam outline as the checklist, then study enough surrounding context to explain why a control, design, policy, or operational action is appropriate in a specific scenario. Follow a feature or application from requirements through design, coding, testing, release, operations, and maintenance, noting security evidence and decision gates at each step. Spend extra time on applied scenarios, because higher-level questions usually reward judgment, sequencing, and tradeoff analysis.

06

Secure Software Testing

The Secure Software Testing section covers secure development practices, requirements, design review, implementation controls, testing evidence, release governance, dependency risk, and operational maintenance across the software lifecycle. For Certified Secure Software Lifecycle Professional, this domain is normally tested through professional security judgment: candidates need to connect terminology with risk, architecture, control effectiveness, governance, and operational consequences across realistic enterprise environments.

14% Weight
Question notes

Weight: about 14% of the exam content for this certification. ISC2 questions commonly use scenario-based wording and may require choosing the most appropriate, most complete, or best-risk-aligned answer from several plausible options. For Secure Software Testing, expect software lifecycle, application security, testing, and deployment scenarios, with questions that may blend this objective with neighboring exam areas instead of isolating it as a standalone topic.

Preparation tips

When preparing for Secure Software Testing, use the official ISC2 exam outline as the checklist, then study enough surrounding context to explain why a control, design, policy, or operational action is appropriate in a specific scenario. Follow a feature or application from requirements through design, coding, testing, release, operations, and maintenance, noting security evidence and decision gates at each step. Spend extra time on applied scenarios, because higher-level questions usually reward judgment, sequencing, and tradeoff analysis.

07

Secure Software Deployment, Operations and Maintenance

The Secure Software Deployment, Operations and Maintenance section covers data quality, model or analytics lifecycle decisions, evaluation criteria, governance controls, privacy considerations, and the practical limits of automation in real delivery environments. For Certified Secure Software Lifecycle Professional, this domain is normally tested through professional security judgment: candidates need to connect terminology with risk, architecture, control effectiveness, governance, and operational consequences across realistic enterprise environments.

14% Weight
Question notes

Weight: about 14% of the exam content for this certification. ISC2 questions commonly use scenario-based wording and may require choosing the most appropriate, most complete, or best-risk-aligned answer from several plausible options. For Secure Software Deployment, Operations and Maintenance, expect data, AI, analytics, and automation scenarios that require judgment rather than tool memorization, with questions that may blend this objective with neighboring exam areas instead of isolating it as a standalone topic.

Preparation tips

When preparing for Secure Software Deployment, Operations and Maintenance, use the official ISC2 exam outline as the checklist, then study enough surrounding context to explain why a control, design, policy, or operational action is appropriate in a specific scenario. Review how data is sourced, validated, protected, monitored, and turned into decisions, then connect those steps to value, risk, stakeholder trust, and operational adoption. Spend extra time on applied scenarios, because higher-level questions usually reward judgment, sequencing, and tradeoff analysis.

08

Secure Software Supply Chain

The Secure Software Supply Chain section covers data quality, model or analytics lifecycle decisions, evaluation criteria, governance controls, privacy considerations, and the practical limits of automation in real delivery environments. For Certified Secure Software Lifecycle Professional, this domain is normally tested through professional security judgment: candidates need to connect terminology with risk, architecture, control effectiveness, governance, and operational consequences across realistic enterprise environments.

10% Weight
Question notes

Weight: about 10% of the exam content for this certification. ISC2 questions commonly use scenario-based wording and may require choosing the most appropriate, most complete, or best-risk-aligned answer from several plausible options. For Secure Software Supply Chain, expect data, AI, analytics, and automation scenarios that require judgment rather than tool memorization, with questions that may blend this objective with neighboring exam areas instead of isolating it as a standalone topic.

Preparation tips

When preparing for Secure Software Supply Chain, use the official ISC2 exam outline as the checklist, then study enough surrounding context to explain why a control, design, policy, or operational action is appropriate in a specific scenario. Review how data is sourced, validated, protected, monitored, and turned into decisions, then connect those steps to value, risk, stakeholder trust, and operational adoption. Spend extra time on applied scenarios, because higher-level questions usually reward judgment, sequencing, and tradeoff analysis.

Study effort

Certified Secure Software Lifecycle Professional CSSLP Preparation and Difficulty Analysis

Candidates should plan for 80 to 160 hours of focused study time to master the eight domains of the CSSLP. Success requires four years of relevant full-time experience, as the exam assesses comprehensive knowledge across the entire software lifecycle beyond specific tool expertise.

Study time

80-160h

Difficulty

Recommended experience

48 months

Practice exam useful
Hands-on lab useful

Exam cost

Exam Fee and Registration Cost for the Certified Secure Software Lifecycle Professional (CSSLP)

Use the structured fee rows for the latest known amount and compare region, tax, voucher, or membership notes before registering.

$599

United States

Standard priceTax may vary

Prerequisites

What to know before starting ISC2 Certified Secure Software Lifecycle Professional (CSSLP)

ISC2 requires four years of cumulative full-time experience in one or more CSSLP domains. A relevant bachelor or master degree in computer science, IT, or a related field may satisfy up to one year. Candidates who pass before meeting the requirement can follow the Associate of ISC2 path.

Career fit

Roles and skills connected to this certification

Explore the roles and skills most directly connected to this certification, then use those paths to compare adjacent credentials.

RoleApplication Security Engineer

Focuses on enhancing software security by integrating secure practices throughout the development lifecycle, including design, testing, and threat analysis.

4 certificationsExplore
RoleSoftware Developer

Software developers design, build, and maintain application code, integrations, features, and services across diverse business and platform environments.

7 certificationsExplore
RoleSecurity Engineer

Security engineers design, implement, and maintain technical security controls to protect an organization's systems, data, and infrastructure from threats.

9 certificationsExplore
RoleSecurity Architect

Designs comprehensive security architectures, control patterns, and enterprise security models to establish robust protection strategies.

5 certificationsExplore
SkillSecure Coding

Writing software to minimize common security weaknesses and unsafe behaviors, focusing on proactive prevention of vulnerabilities during the development lifecycle.

6 certificationsExplore
SkillSoftware Security

Enhance software resilience against threats through secure design, coding, testing, vulnerability management, and secure lifecycle practices throughout the development process.

3 certificationsExplore
SkillApplication Security Testing

Application Security Testing focuses on identifying vulnerabilities and weaknesses in software throughout the development lifecycle and after deployment.

4 certificationsExplore
SkillThreat Modeling

Threat Modeling is a structured approach to identifying potential security threats and vulnerabilities in systems, applications, and processes to inform the design of effective defenses.

9 certificationsExplore

Related areas

Related domains and industries

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