CISSP preparation doesn’t have to drain your bank account. Between the exam fee, study guides, and practice questions, costs add up fast. But some of the most valuable preparation materials cost nothing at all. Government publications, official ISC2 documents, community resources, and free video courses can form the backbone of a successful study plan.
I’ve helped candidates pass CISSP using almost entirely free resources. It takes more effort to find and organize materials yourself compared to buying an all-in-one course, but the information is just as good. Often better, because you’re going directly to authoritative sources rather than someone’s summary of them. Here’s everything worth your time that won’t cost you a dollar.
The ISC2 Exam Outline: Your Free Roadmap
Start with the official CISSP Exam Outline from ISC2. This document lists every topic the exam can test. Not might test. Will test. If something appears on your exam, it’s referenced somewhere in this outline. Print it out, keep it next to you while studying, and check off topics as you master them.
The outline organizes content by domain and subtopic. Each of the eight CISSP domains gets broken down into specific knowledge areas. When you’re studying from any resource, you can trace the material back to the outline to confirm you’re learning relevant content. If a study guide covers something not in the outline, you can skip it. If the outline mentions something your study guide glossed over, you know to research it elsewhere.
ISC2 updates this outline periodically. The 2024 refresh added content on zero trust architecture, cloud security concepts, and updated privacy regulations. Always download the current version directly from ISC2 rather than relying on copies floating around the internet. Outdated outlines will have you studying the wrong material.
Beyond the exam outline, ISC2 offers free webinars and resources on their certification page. These change regularly, so check back monthly during your study period. They occasionally release domain-specific deep dives and exam preparation guidance directly from the people who write the test.
NIST Publications: The Foundation of CISSP Knowledge
The National Institute of Standards and Technology publishes hundreds of documents on cybersecurity. Many CISSP exam concepts trace directly to NIST frameworks and guidelines. Reading the source material gives you deeper understanding than any study guide summary can provide. Best of all, every NIST publication is free to download.
The NIST SP 800-53 Security and Privacy Controls document is essential reading for understanding security controls. The CISSP exam tests your ability to select and implement appropriate controls. This publication catalogs hundreds of controls organized by family: access control, audit and accountability, configuration management, incident response, and more. You don’t need to memorize every control, but understanding the framework and how controls are organized will help you answer exam questions.
The NIST Cybersecurity Framework appears throughout CISSP content. The framework’s five functions (Identify, Protect, Detect, Respond, Recover) provide a structure for thinking about organizational security that the exam frequently references. Download the framework document and understand how the functions, categories, and subcategories connect.
For risk management concepts tested heavily in Domain 1, read NIST SP 800-30 Guide for Conducting Risk Assessments. This document explains risk assessment methodology in detail: threat identification, vulnerability analysis, likelihood determination, and impact analysis. The exam expects you to understand these concepts thoroughly.
Other valuable NIST publications for CISSP preparation include:
- SP 800-37 Risk Management Framework covers the RMF process that government agencies use and that CISSP tests extensively. Understanding the steps from categorization through continuous monitoring helps with governance and risk questions.
- SP 800-61 Computer Security Incident Handling Guide explains incident response methodology that appears in Domain 7. The preparation, detection, containment, eradication, recovery, and lessons learned phases come directly from this document.
- SP 800-88 Guidelines for Media Sanitization covers data destruction methods tested in Domain 2. Understanding the difference between clearing, purging, and destroying helps with asset security questions.
- SP 800-63B Digital Identity Guidelines explains authentication assurance levels and identity proofing concepts tested in Domain 5. This is where official guidance on password policies and multi-factor authentication comes from.
You don’t need to read these publications cover to cover. Skim them to understand their structure, then reference specific sections when studying related topics. Having read the actual source gives you confidence when exam questions reference these frameworks.
CISA and Government Cybersecurity Resources
The Cybersecurity and Infrastructure Security Agency publishes practical guidance that supplements NIST’s more formal frameworks. Their resources tend to be more accessible and directly applicable to real-world scenarios.
The CISA Cyber Threats and Advisories page provides current threat intelligence. Reading recent advisories helps you understand how attacks actually work, which improves your ability to answer scenario-based questions. When the exam presents an attack scenario, recognizing the attack pattern from real-world examples helps you identify the appropriate response.
CISA’s Free Cybersecurity Services and Tools page lists resources organizations actually use. Familiarity with these tools and services demonstrates practical knowledge beyond textbook concepts.
For critical infrastructure security tested in multiple domains, CISA provides sector-specific guidance. If you work in healthcare, finance, energy, or other regulated industries, reading the relevant sector guidance adds context that makes exam questions more intuitive.
The National Vulnerability Database is another free resource worth exploring. Understanding how vulnerabilities are cataloged, scored using CVSS, and tracked helps with vulnerability management questions. Browse some recent CVEs to understand the format and severity scoring system.
Kelly Handerhan’s Cybrary Course: The Gold Standard Free Video
If you learn better from video than reading, Kelly Handerhan’s CISSP course on Cybrary is the most recommended free video resource in the CISSP community. Search any CISSP forum or subreddit and you’ll find her name mentioned constantly by successful candidates.
Handerhan’s teaching style emphasizes thinking like a security manager rather than a technician. This mindset shift is exactly what the exam requires. She constantly reminds students to consider risk, business impact, and organizational perspective when answering questions. Many candidates credit her approach with helping them finally understand what CISSP is really testing.
The course covers all eight domains with lectures, examples, and exam tips. It’s not a replacement for a comprehensive study guide, but it’s an excellent supplement. Watch the videos for domains you find confusing, or use them as an introduction before reading deeper material.
Cybrary requires free registration to access the course. Some additional features require a paid subscription, but the core CISSP content is available free. The course occasionally gets updated, so you’re getting reasonably current material.
Beyond Handerhan’s course, YouTube has numerous CISSP preparation videos of varying quality. Search for specific topics you’re struggling with rather than trying to find a complete video course. Channels from practicing security professionals often explain concepts better than formal training videos.
Reddit and Online Communities
The r/cissp subreddit is one of the most valuable free resources available. Thousands of candidates share their experiences: what they studied, what appeared on their exams, which resources helped, which wasted time. Reading “I passed” posts from recent test-takers gives you current intelligence about exam content and difficulty.
Search the subreddit for specific topics you’re studying. Someone has probably asked about whatever concept is confusing you, and the community’s explanations often clarify things better than textbooks. The discussions are practical and experience-based rather than theoretical.
Pay attention to common advice that appears repeatedly. When dozens of successful candidates recommend the same approach or warn against the same mistakes, that’s valuable pattern data. The community collectively has more exam experience than any individual instructor.
Beyond Reddit, Discord servers and LinkedIn groups focused on CISSP preparation offer study partners and accountability. Studying alone is hard. Finding others at similar points in their preparation helps maintain motivation during the months-long study process. Some candidates form small study groups that meet weekly to discuss topics and quiz each other.
Be cautious about “brain dump” sites or anyone offering actual exam questions. Using stolen exam content violates ISC2’s ethics requirements and can result in certification revocation. The community will warn you away from these sites. Stick to legitimate practice questions and discussion of concepts rather than memorizing specific questions.
Free Practice Questions Worth Your Time
Quality practice questions are essential for exam preparation. While the best question banks cost money, several free options provide useful practice.
ISC2 offers a free practice quiz on their website. It’s limited in scope but gives you a feel for official question style. The questions come from ISC2 directly, so the format and difficulty are representative.
Study guides typically include practice questions. If you’re using a comprehensive study guide, work through all included questions even if you’re supplementing with free resources elsewhere. The questions in Sybex, Conrad, and other major guides are generally well-written and aligned with exam objectives.
Several websites offer free CISSP practice questions, though quality varies dramatically. Look for questions that explain why the correct answer is right and why other options are wrong. Questions without explanations have limited learning value. You need to understand the reasoning, not just memorize answers.
The most valuable practice comes from questions that make you think rather than recall. The actual exam presents scenarios and asks you to apply knowledge, not regurgitate facts. If free practice questions seem like simple recall, they’re not preparing you for the real exam’s difficulty level.
Create your own questions as you study. When you learn a concept, write a question testing that concept. Then answer your own questions later. The act of creating questions forces you to understand material deeply enough to test it.
Flashcards and Memory Aids
Flashcards help with terminology, acronyms, and quick-recall concepts that support deeper understanding. Several free flashcard resources exist for CISSP.
Quizlet and Anki both have user-created CISSP flashcard decks available free. Quality varies since anyone can create and share decks. Look for decks with high ratings and recent updates. Outdated decks might contain information from old exam versions.
The best approach is creating your own flashcards as you study. When you encounter a term or concept worth memorizing, make a card immediately. The act of creating the card reinforces learning, and you end up with a personalized deck focused on your weak areas rather than generic content.
Anki’s spaced repetition algorithm is particularly effective for long-term retention. The app shows you cards at increasing intervals based on how well you remember them. Cards you struggle with appear more frequently. This approach is more efficient than reviewing all cards equally.
Don’t over-rely on flashcards. They’re useful for memorization but don’t help with the analytical thinking CISSP requires. Use them to lock in terminology and definitions, then spend most of your study time on understanding concepts deeply enough to apply them in scenarios.
Free Textbooks and Academic Resources
Several universities publish course materials online that cover CISSP topics. While not specifically designed for exam preparation, these resources provide thorough explanations of security concepts.
MIT OpenCourseWare includes computer security courses with lecture notes, readings, and assignments. The material goes deeper than exam preparation requires, but it builds genuine understanding rather than surface-level familiarity.
Textbook publishers occasionally offer free chapters or sample content. Check the websites for major security textbooks. Even a few free chapters on topics like cryptography or network security can supplement your other resources.
For cryptography specifically, which many candidates find challenging, academic explanations often work better than study guide summaries. Search for university lecture notes on symmetric encryption, public key cryptography, and hashing. Understanding the math and theory behind cryptographic concepts helps you answer questions about when to use which approach.
Podcasts and Audio Learning
Podcasts let you study during commutes, workouts, or other times when reading isn’t practical. Several security podcasts cover CISSP-relevant topics, though few focus exclusively on exam preparation.
General cybersecurity podcasts keep you current on threats, breaches, and industry trends. This context helps with scenario questions that reference real-world situations. Understanding how actual incidents unfold makes exam scenarios more intuitive.
Search podcast apps for “CISSP” to find shows specifically about certification preparation. New podcasts launch regularly, so options available when you’re studying may differ from when this was written. Listen to a few episodes to find hosts whose style works for you.
Audio learning works best as a supplement rather than primary study method. You can’t easily reference back to specific points or take notes while listening. Use podcasts to reinforce concepts you’ve already studied through reading rather than to learn new material for the first time.
Building a Free Study Plan
Free resources can absolutely get you to a passing score, but they require more organization than buying an all-in-one course. Here’s how to structure self-directed study using free materials.
Start with the exam outline. Download and print the ISC2 exam outline. This is your syllabus. Everything you study should map back to something in this document.
Watch Kelly Handerhan’s videos as introduction. Before diving deep into any domain, watch her lecture on that domain. Her overview helps you understand what matters and how topics connect before you read detailed material.
Read NIST publications for depth. When the video or outline references a specific framework, read the actual NIST publication. This gives you authoritative understanding rather than secondhand summaries.
Use Reddit for clarification. When concepts confuse you, search r/cissp. Someone has probably explained it in a way that clicks. Post questions if you can’t find existing answers.
Practice questions throughout. Don’t save practice for the end. Start taking practice questions within your first week and use wrong answers to identify topics needing more study.
Create flashcards for retention. As you study, build a flashcard deck of terms and concepts worth memorizing. Review daily using spaced repetition.
Track progress against the outline. Mark topics as you complete them. This shows you what’s left and prevents the common mistake of over-studying comfortable topics while neglecting weak areas.
When Free Isn’t Enough
Free resources have limitations. Recognizing when to invest money saves time and frustration.
If you need structured accountability, free resources may not work well. Self-directed study requires discipline that not everyone has. A paid course with deadlines and progress tracking might be worth the cost if you struggle to stay on schedule with free materials.
Practice question quality matters enormously. Free questions are often easier than the actual exam or poorly written. If you’re consistently scoring well on free practice tests but the material still feels shaky, invest in a quality question bank. Good practice questions are worth paying for.
If you’ve failed the exam before, consider what your free approach might have missed. Sometimes a different perspective from a paid training program or additional study guide helps concepts finally click. The cost of retaking the exam exceeds most study materials.
Time has value. Free resources require more time to find, evaluate, and organize. If your employer pays for training or you have limited study time, buying consolidated resources might be more efficient than assembling free alternatives.
Avoiding Worthless Free Resources
Not all free resources help. Some waste time or actively hurt your preparation. Learn to identify what to avoid.
Outdated material: CISSP content changes. Resources from 2018 or earlier may cover topics no longer tested or miss new additions. Check publication dates and prefer recent materials.
Brain dumps: Sites offering “real exam questions” violate ISC2 ethics and often contain wrong answers anyway. Using them risks your certification and doesn’t actually prepare you for the adaptive exam format.
Low-quality videos: Anyone can post YouTube videos. Some are excellent, many are terrible. Check view counts, comments, and creator credentials before investing time. A highly-viewed video with positive comments from people who passed is probably worthwhile.
Overly simplified summaries: Resources promising to teach CISSP in a weekend or reduce everything to a few pages are skipping material you need. There are no shortcuts. The exam requires genuine understanding across eight broad domains.
Materials from unknown sources: Stick to resources from ISC2, NIST, recognized publishers, and community-vetted sources. Random PDFs from file-sharing sites may contain errors or malware.
Making Free Resources Work
Success with free resources requires more effort than buying a course, but the payoff extends beyond passing the exam. You learn to find authoritative sources, evaluate information quality, and build knowledge independently. These skills serve you throughout a security career where you’ll constantly need to research new threats, technologies, and frameworks.
The candidates I’ve seen succeed with free resources share common traits. They’re organized about tracking what they’ve studied. They’re honest about weak areas rather than avoiding difficult topics. They engage with communities rather than studying in isolation. And they recognize when a topic needs paid resources rather than stubbornly avoiding all expenses.
Start with the ISC2 exam outline and Kelly Handerhan’s videos. Add NIST publications as you encounter referenced frameworks. Use Reddit and practice questions to identify gaps. Build flashcards for retention. This combination costs nothing and covers everything the exam tests.
The money you save on study materials can go toward the exam fee, a good study guide if you decide you want one, or celebration after you pass. Free doesn’t mean inferior. It means you’re going directly to authoritative sources rather than paying someone to summarize them for you.
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