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The Top 5 IT Security Threats Facing Small Businesses in 2025 and How to Prevent Them

If it ain’t broke, don’t fix it. Or should you?

by: Alex Barrett

October 30, 2026

It’s working, why change?

Computer Network Services Ltd works with a range of small businesses. A common reason clients give for postponing technology upgrades is the belief that “if it isn’t broken, it doesn’t need fixing.” However, equipment that appears to function normally may no longer meet current operational or security requirements.

Technology purchased three to five years ago, or earlier, may no longer provide the capabilities or protection a business need today. This is particularly relevant to routers, firewalls and other security devices, although the concern extends to software and wider IT infrastructure. Vulnerabilities in website software, including PHP, can expose organisations to security risks and may require affected services to be taken offline while issues are resolved.

Many technology vendors incorporate artificial intelligence (AI) into their products to help detect suspicious activity and protect businesses from potential threats. However, AI can also be used by attackers, making it important to review and maintain security measures as threats evolve.

Keeping technology up to date is an important part of protecting a business against external threats. Cyberattacks are not limited to website defacement or malware infections; they can also involve the theft of valuable data, including names, addresses and financial information. Such theft may go undetected, reinforcing the need for regular updates, security reviews and appropriate safeguards.

Practical Security Next Steps

  • Keep operating systems, applications, routers and firewalls updated, and plan to replace equipment that no longer receives security updates.
  • Enable multi-factor authentication for email, financial systems and other key accounts, and use unique passwords stored in a password manager.
  • Back up essential business data regularly, keep a protected copy separate from everyday systems, and test that files can be restored.
  • Limit access to sensitive information to those who need it, and remove accounts promptly when staff leave.
  • Train staff to recognise suspicious emails and verify unusual payment requests through a trusted contact method.
  • Assign responsibility for security checks and document who to contact and what to do if an incident occurs.

Suggested Review Schedule

Use this schedule as a starting point and adapt it to your business risks. Address critical security alerts promptly rather than waiting for a scheduled review.

  • Weekly: Check backup results, outstanding updates and security alerts.
  • Monthly: Review user access and multi-factor authentication coverage, and test a sample file restore.
  • Quarterly: Review router and firewall settings with your IT provider, refresh staff awareness and check incident contact details.
  • Annually: Review equipment support dates and replacement plans, test recovery of key systems and rehearse your incident response.

Also review access and security settings whenever staff leave or key systems change.

Don’t get caught out. Book a free, no-pressure call with our team to review your installation.