CIS Controls Implementation Checklist: A Practical Guide for Businesses
Posted in CIS Top 18 Consulting
CIS Controls Implementation Checklist
Cybersecurity can feel overwhelming for businesses unsure where to start. New threats show up daily, security products claim to fix every issue, and compliance rules keep changing. Many companies spend time and money on tools without knowing if they really lower risk. I recently read a post (Implementing CIS Top 18 Controls) that I wrote a couple of years ago, and I want to update it today with a simple checklist.
The Center for Internet Security (CIS) Controls were created to solve that problem.
Instead of listing hundreds of technical requirements, the CIS Controls create a simple framework. These controls help businesses focus on the most important security improvements. Built on years of real-world attack data, the CIS Controls are widely recognized as a practical way to reduce cyber risk.
This CIS Controls checklist helps business owners, IT managers, and security leaders know where to start, what to focus on, and how to build a stronger cybersecurity program.
What Are the CIS Controls?
The CIS Controls are a set of cybersecurity best practices, ranked by priority, and developed by the Center for Internet Security. They help businesses defend against the most common cybercriminal tactics. We see it as a complete cybersecurity framework.
Many compliance frameworks outline what needs to be done, but the CIS Controls offer practical guidance on how to improve security. Businesses of all sizes use them because they offer a realistic way to build a strong cybersecurity program.
Many companies also use the CIS Controls to better align with standards like the NIST Cybersecurity Framework, ISO 27001, CMMC, and others.
Why Businesses Use the CIS Controls
Imagine building a new office.
You could purchase the most expensive alarm system available, but if the doors never lock and the windows remain open, the alarm alone won’t keep the building secure.
Cybersecurity works the same way.
Businesses often invest in advanced security technologies before implementing the basic controls that stop the majority of attacks.
The CIS Controls help companies build a solid security foundation before investing in more advanced capabilities.
CIS Controls Implementation Checklist
The checklist below outlines the steps many businesses take to implement the CIS Controls. Every company is different, but these steps help build a strong foundation for reducing cyber risk.
- Inventory All Hardware Assets
You cannot protect devices you do not know exist.
Keep an up-to-date list of all laptops, desktops, servers, network equipment, mobile devices, cloud resources, and other tech assets. Devices you don’t know about are often missed during updates and monitoring, making them easy targets for attackers.
- Inventory All Software
Every installed application introduces potential risk.
Make a list of approved software, identify any unauthorized apps, remove programs that are no longer supported, and establish a process for reviewing new software before use.
Keeping your software list up to date also makes it easier to manage security risks and software licenses.
- Protect Sensitive Data
Not all information requires the same level of protection.
Find out where your sensitive business information is stored, label your most important data, encrypt it when needed, and only let employees who need it for work have access.
Understanding where sensitive data resides is one of the most valuable steps any company can take.
- Secure Configurations
Many cyberattacks succeed because systems are deployed with default settings.
Check your operating systems, cloud setups, servers, firewalls, apps, Microsoft 365, and network equipment to make sure secure settings are always used.
Setting standard secure configurations helps lower your risk of unnecessary exposure.
- Manage User Accounts
Every user account represents a potential attack path.
Check user accounts often, quickly deactivate accounts that aren’t used, require strong passwords, use multi-factor authentication, and ensure employees have only the access they need.
Many successful attacks begin with compromised credentials rather than sophisticated hacking techniques.
- Strengthen Access Controls
Employees should have access only to the systems and information necessary to perform their jobs.
Check who has admin privileges, keep admin accounts separate from regular accounts, and review user permissions regularly.
Limiting permissions helps reduce the damage an attacker can do if they get in.
- Continuously Manage Vulnerabilities
New vulnerabilities are discovered every day.
Run regular vulnerability scans, fix the most critical issues first, make sure patches are installed, and monitor security updates from your vendors.
Managing vulnerabilities should be a regular part of your business, not just a once-a-year task.
- Maintain Audit Logs
Security logs provide valuable evidence during investigations.
Turn on logging for important systems, collect logs in one place if you can, keep them for the right amount of time, and regularly check for anything suspicious.
If you don’t have good logging, many cyber incidents can go unnoticed for months.
- Secure Email and Web Browsers
Email remains one of the most common methods attackers use to compromise businesses.
Set up email filters, teach employees about phishing, limit risky web browsing, and use tools like SPF, DKIM, and DMARC to help stop email fraud.
- Protect Against Malware
Modern endpoint protection should extend beyond traditional antivirus software.
Deploy endpoint detection and response (EDR), monitor suspicious behavior, isolate infected systems quickly, and ensure security tools remain updated.
Effective malware protection combines technology with continuous monitoring.
- Perform Regular Data Backups
Backups remain one of the strongest defenses against ransomware.
Make sure your backups are encrypted, tested often, stored away from your main systems, and protected from unauthorized changes.
A backup is not helpful if you can’t restore it during an incident.
- Conduct Security Awareness Training
Employees play an important role in cybersecurity.
Give employees regular training on spotting phishing, protecting passwords, reporting anything suspicious, and handling sensitive information safely.
Cybersecurity awareness should become part of the company’s culture rather than a once-a-year exercise.
- Test Your Security
One of the biggest mistakes businesses make is assuming their security controls are working simply because they have been installed.
Regular vulnerability checks, penetration tests, cloud security reviews, and audits show if your security controls really work in real-world situations.
Testing turns guesses into real proof.
How Long Does CIS Controls Implementation Take?
The time it takes to implement the CIS Controls depends on your business size, current security level, the rules you must follow, and the resources you have.
A small company with a relatively simple IT environment can often set up a strong security baseline in a few months. Cloud environments and complex infrastructure often implement the CIS Controls as part of a multi-year cybersecurity roadmap.
The main goal is to keep improving, not to be perfect.
Common Mistakes Businesses Make
Many businesses buy security products before making a clear plan.
Others focus only on compliance and miss out on practical security improvements.
Some implement policies that employees cannot realistically follow, while others perform one-time security projects without establishing ongoing processes.
The most common mistake is believing cybersecurity is complete after implementing a few technical controls.
Cybersecurity needs ongoing monitoring, regular reviews, employee training, and support from leadership.
Related Cybersecurity Services
To implement the CIS Controls well, you need both technical know-how and strategic advice. Tanner Security helps businesses improve their cybersecurity with services that support every step of the CIS Controls implementation process.
CIS Controls Gap Assessments: Evaluate your current security posture against the CIS Controls, identify gaps, and prioritize improvements based on business risk.
Vulnerability Assessments: Spot known security weaknesses in your internal networks, external systems, cloud setups, and devices before attackers can take advantage of them.
Penetration Testing: Test if your current security controls really protect your business by simulating real-world attacker tactics.
Microsoft 365 Security Review: Review Microsoft 365 configurations, identity management, email security, and collaboration settings to reduce cloud security risks.
Virtual CISO (vCISO) Services: Get executive-level cybersecurity leadership, strategic planning, and ongoing advice without needing to hire a full-time Chief Information Security Officer.
Frequently Asked Questions
What are the CIS Controls?
The CIS Controls are a prioritized set of cybersecurity best practices developed by the Center for Internet Security to help businesses defend against common cyber threats.
Are the CIS Controls required by law?
No. The CIS Controls are voluntary. However, many businesses use them to strengthen security and support compliance with frameworks such as NIST CSF, CMMC, HIPAA, and ISO 27001.
How many CIS Controls are there?
The current version includes 18 CIS Controls covering asset management, vulnerability management, access control, incident response, and security awareness.
How long does implementation take?
It depends on the size and complexity of your environment. Smaller businesses may establish a strong baseline in several months, while larger companies often implement the controls over multiple phases.
Can small businesses use the CIS Controls?
Absolutely. One of the strengths of the CIS Controls is that they scale well for businesses of all sizes.
How often should the CIS Controls be reviewed?
Security controls should be reviewed continuously, with formal assessments performed at least annually or after significant technology changes.
What’s the difference between the CIS Controls and the NIST Cybersecurity Framework?
The NIST Cybersecurity Framework provides a high-level approach to managing cybersecurity risk, while the CIS Controls offer practical safeguards that help businesses implement many of the NIST objectives.
Should businesses perform penetration testing after implementing the CIS Controls?
Yes. Penetration testing validates whether your security controls effectively defend against real-world attacks and helps identify weaknesses that configuration reviews alone may not detect.
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