If your business relies on digital systems (and whose doesn’t?), staying secure is critical. A strong cybersecurity checklist is your best starting point to assess where you stand, spot vulnerabilities, and tighten up defences before trouble hits.
Cyber threats are evolving fast, but so can your readiness. Use this comprehensive checklist to review your IT setup across six key areas: from network security to third-party risks. Whether you’re a growing SME or an established firm, these are the steps that insurers, regulators, and threat actors all care about.
Let’s dive in, and if you don’t tick every box, don’t panic. At Commercial Networks show you where to go next.
1. Network Security: Your First Line of Defence
Your network security forms the backbone of your cyber resilience. Without a solid perimeter, you’re inviting attackers straight into your systems.
✅ Do you use a business-grade firewall?
Make sure it’s properly configured and regularly updated.
✅ Is your Wi-Fi secured with WPA3 encryption?
Upgrade if you’re still using older standards like WPA2.
✅ Have you segmented your network?
Limit access between departments to contain breaches.
✅ Do you use VPNs for remote access?
Encrypt remote traffic to protect hybrid and remote teams.
✅ Are regular scans and penetration tests in place?
Identify weaknesses before someone else does.
2. Endpoint Protection: Don’t Ignore Devices
Laptops, phones, and desktops are gateways into your business. Without proper controls, they’re easy entry points for malware or worse.
✅ Are all devices patched and up to date?
Outdated software is one of the most common vulnerabilities.
✅ Do you run antivirus and anti-malware on every device?
Ensure they’re set to update and scan in real time.
✅ Can users install software freely?
Restrict this to prevent unauthorised (and potentially risky) apps.
✅ Are automatic updates enabled?
Don’t rely on users to remember.
3. User Access & Authentication: Control Matters
Who has access to what? And how tightly is it controlled?
✅ Are strong passwords and MFA enforced?
No account should rely on just a single factor.
✅ Do you follow least privilege principles?
Only give staff access to the systems they actually need.
✅ Are inactive accounts regularly removed?
Abandoned accounts are an open door to attackers.
✅ Is Single Sign-On (SSO) in place?
Simplifies login while improving security oversight.
4. Email Security & Phishing Defence
Phishing remains one of the most common (and successful) cyber attack vectors. Train your team, test them, and back it up with solid systems.
✅ Are spam filters and email scanning in place?
These should run automatically and update often.
✅ Have your staff received phishing awareness training?
Ongoing security awareness training is now an insurer expectation.
✅ Do you run simulated phishing campaigns?
It’s the best way to measure real-world readiness.
✅ Are attachments and links scanned before they open?
Catch malicious content before it reaches the user.
5. Data Protection & Backups: Plan for the Worst
If your data’s not recoverable, everything stops. Plan for the worst, and test those plans regularly.
✅ Is data encrypted at rest and in transit?
This protects sensitive information even if intercepted.
✅ Do you use both on-site and cloud backups?
Diversified storage increases reliability and resilience.
✅ Are your backups tested regularly?
Don’t assume they’ll work — know for sure.
✅ Are you GDPR compliant?
It’s not just a checkbox — it’s legal protection.
6. Third-Party & Supply Chain Risk
Your business might be secure, but what about your partners?
✅ Do you assess vendor cyber hygiene?
You’re only as secure as your weakest supplier.
✅ Are third-party integrations monitored for risks?
That shiny new tool might be a Trojan horse.
✅ Is access restricted for external providers?
Only grant access to what’s absolutely necessary.
✅ Have you adopted a zero-trust model?
Assume nothing, verify everything.
✅ Are vendor agreements clear on cybersecurity?
Include expectations around compliance and breach response.
✅ Are your partners receiving security best practice advice?
Raise the bar across your supply chain with education.
Final Thoughts: How Did You Score?
If you ticked most of these boxes, your cybersecurity checklist is looking good. But if there were gaps? That’s not a failure, it’s a to-do list.
Cybersecurity isn’t a one-off project. It’s an ongoing process of assessing risk, improving defences, and staying alert. That’s where we come in.
Need a Cybersecurity Audit? Let’s Talk.
At Commercial Networks, we help UK businesses take control of their security posture with structured assessments, training, and managed protection.
✅ Need help running a full cybersecurity audit?
✅ Want support implementing Cyber Essentials?
✅ Not sure how secure your remote workers really are?
📞 Call us on 0333 444 3455
📧 Or email sales@cnltd.co.uk to schedule your audit or review
Let’s turn your checklist into action, before a cybercriminal does.
