Many companies encounter CIS 18 for the first time in connection with NIS2, cyber insurance, or a customer requirement. The problem is rarely willingness—but rather overview.
18 controls can quickly feel overwhelming, especially for SMEs without a large IT department.
Here you get a prioritized and realistic approach: which CIS 18 controls are most effective first—and why.
What is CIS 18 – a brief refresher
CIS 18 is a cybersecurity framework developed by the Center for Internet Security that brings together the most effective security measures against today's threats.
The framework is often used as:
- Practical foundation for cybersecurity
- Reference for NIS2 compliance
- Requirements for cyber insurance
Overview of CIS 18:
https://securefirst.dk/cis18-compliance/
Why prioritization is crucial for SMEs
SMEs typically have:
- Limited resources
- Get specialists
- Many hats on the same person
Therefore, it is rarely realistic to implement all 18 controls at once.
Effectiveness > perfection is the key.
The 5 most important CIS 18 controls for SMEs
1. Awareness training (CIS control 14)
Human error remains the biggest cause of security breaches.
Phishing, social engineering, and weak passwords almost always start with the user.
Awareness training provides:
- Fewer clicks on phishing
- Better reporting of suspicious behavior
- Documentation for management and insurance
Awareness training at SecureFirst:
https://securefirst.dk/awareness-traening/
2. Phishing simulation (part of control 14)
Training works best when tested in practice.
Phishing simulation shows how employees react in reality – not in theory.
Advantages:
- Measurable risk reduction
- Data-driven improvement
- Clear documentation
Phishing simulation:
https://securefirst.dk/phishing-simulation/
3. Asset overview (Hardware & Software Inventory)
You cannot protect what you do not know.
Many companies lack an up-to-date overview of:
- Units
- Users
- Systems
- Access
Without this, both NIS2 and CIS 18 quickly become theoretical.
SecureFirst brings together overview and documentation in one place.
4. Incident Response – what do you do when something happens?
An attack is not just a question of if – but when.
CIS 18 recommends clear procedures for:
- Discovery
- Handling
- Communication
- Documentation
This is central to both CIS 18 and NIS2.
NIS2 and incident management:
https://securefirst.dk/nis2-compliance/
5. Monitoring of data breaches
Many companies only discover data breaches after the damage has been done.
Proactive monitoring provides:
- Early warning
- Faster response
- Better documentation
Monitoring of data breaches:
https://securefirst.dk/monitorering-af-databrud/
How CIS 18 supports NIS2 in practice
NIS2 sets requirements for:
- Risk management
- Awareness
- Incident response
- Management responsibility
CIS 18 provides the operational toolbox that makes the requirements manageable in everyday life.
Read the context here:
https://securefirst.dk/nis2-compliance/
How SecureFirst helps SMEs achieve their goals
SecureFirst is designed for companies that:
- Will work in a structured manner – without complexity
- Must be able to document their safety
- Lack of time for manual processes
The platform brings together:
- Training
- Phishing
- Monitoring
- Compliance overview
Get an overview:
https://securefirst.dk/
Calculate level and price:
https://securefirst.dk/prisberegner/
FAQ – CIS 18 for SMEs
Should SMEs implement all 18 controls?
No. CIS recommends prioritization. Start with the controls that reduce risk the most.
Which control has the fastest effect?
Awareness training and phishing simulations typically provide the greatest risk reduction in a short period of time.
Is CIS 18 sufficient for NIS2?
CIS 18 does not cover legal aspects, but supports the vast majority of technical and organizational requirements.
Where do you start?
Start with the big picture and people—not just technology.
