Exam Details
ISC2 · CSSLP
Prepare for CSSLP: Integrate security into every phase of the software development lifecycle.
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FAQ
The CSSLP certification validates your ability to incorporate security practices into every phase of the software development lifecycle. This professional-level certification targets software developers, architects, and security professionals who design secure software, define security requirements, implement secure coding, perform security testing, and manage the software supply chain. You'll prove you can build security into applications from concept through deployment and maintenance. As software supply chain attacks and application vulnerabilities dominate the threat landscape, certified professionals who embed security into development are critical to every engineering team.
You're a fit for CSSLP if you:
Not sure if you're ready? Try a free sample quiz: 10 questions, instant results, identify weak areas.
| Domain | Weight | What This Means |
|---|---|---|
| Secure Software Concepts | 12% | Understand core security principles including confidentiality, integrity, availability, and secure design patterns |
| Secure Software Requirements | 13% | Define security requirements, perform abuse case analysis, and translate compliance needs into development specs |
| Secure Software Architecture and Design | 15% | Design secure architectures, perform threat modeling, and apply security patterns and reference architectures |
| Secure Software Implementation | 14% | Apply secure coding practices, use static analysis tools, and manage security during development |
| Secure Software Testing | 14% | Perform dynamic testing, penetration testing, fuzzing, and validate security requirements in QA |
| Secure Software Lifecycle Management | 11% | Manage security across the SDLC, apply configuration management, and integrate security into DevOps |
| Secure Software Deployment, Operations, Maintenance | 11% | Secure deployment pipelines, manage patches, and handle security in production operations |
| Secure Software Supply Chain | 10% | Assess third-party components, manage open-source risk, and secure the software build and delivery pipeline |
You're probably ready if you can:
You might need more prep if:
If this feels too advanced:
If you know the basics but want to build confidence:
This FAQ has been reviewed and updated to reflect the official ISC2 CSSLP exam standards as of July 5, 2026.
As organizations move toward AI-driven development and strict software supply chain regulations (like SBOM mandates), the CSSLP has become a critical "Shift Left" credential.
As of the latest exam refresh, the CSSLP exam now consists of 150 multiple-choice questions. You are given 4 hours (240 minutes) to complete the examination. This updated format includes 100 operational (scored) items and 50 pre-test (unscored) items used for statistical validation.
To pass the CSSLP, you must achieve a minimum scaled score of 700 out of 1000. Because ISC2 uses scaled scoring, the weight of each question varies based on its difficulty. ExamOS offers scenario-based practice quizzes that train you to navigate the "Managerial vs. Technical" logic of the CSSLP, helping you ensure your performance is consistently above the 700-point threshold.
The curriculum is currently balanced to reflect the modern emphasis on supply chain security and cloud-native development. The weightings are:
Preparation should focus on the ISC2 Common Body of Knowledge (CBK):
The standard registration fee is $599 USD. Pricing may vary based on local currency and regional taxes. This fee covers a single attempt; if you do not pass, a full registration fee is required for each retake.
ISC2 utilizes a tiered waiting period for retakes:
The certification is valid for a three-year cycle. To remain in good standing, you must:
You must have a minimum of four years of cumulative, paid work experience in at least one of the eight CSSLP domains.
In the 2026 market, "Shift Left" security is a board-level priority. The CSSLP qualifies you for roles such as Application Security Lead, Secure Software Architect, and DevSecOps Manager. According to recent industry surveys, certified professionals in the software security space often command salaries 20% higher than general developers due to the specialized nature of risk-based software design.
After mastering the secure software lifecycle, you should look toward specialized or management tracks: