Router Security for Small Business: Is Your Network at Risk?

We’re seeing an increase in compromised modem and router devices, particularly those that have reached end of life (EOL).

In many cases, these devices are being exploited as part of large-scale botnets or used for data interception. Some of this activity is linked to organised cybercrime groups, and in certain cases, even state-sponsored actors targeting known vulnerabilities in older networking equipment.

What does “end of life” actually mean?

A modem or router is generally considered end of life (EOL) when the manufacturer stops providing security updates.

At that point:

• Any newly discovered vulnerabilities remain unpatched

• The device may still appear to work normally

• But it is no longer considered secure

This is one of the most common risks we see in small business environments.

How old is too old?

There’s no strict rule, but as a general guideline:

• Devices older than 5 years should be reviewed for replacement

• Security risks increase over time as new vulnerabilities are discovered

• Performance and reliability can also degrade as hardware ages

Even if your internet connection seems fine, your router may still be exposing your network.

It’s not just the office network

This issue doesn’t only apply to business premises.

With more staff working remotely, home networks are now part of your business environment.

An insecure home router can still expose:

• business systems

• VPN connections

• cloud services like Microsoft 365

This is often overlooked but can be a real weak point.

No brand is immune

It’s important to note that no brand is exempt from this.

This includes:

• ISP-supplied devices (Telstra, Optus, etc.)

• consumer-grade routers

• older business networking equipment

Many ISP-provided routers are not maintained long-term from a security perspective.

What should you do?

If your router is less than 5 years old:

• Check that firmware is up to date

• Review security settings

• Disable unused features

If your router is older:

• Consider replacement

• Upgrade to a modern, supported device

• Ensure ongoing firmware updates are available

Not sure where your network stands?

If you’re unsure about:

• the age of your router

• whether it’s still supported

• or how secure your setup is

It’s worth having it checked.

We regularly review and upgrade network setups for small businesses across Dandenong and Melbourne’s south-east, including office and home environments.

Final thoughts

Routers are often “set and forget” devices, but they play a critical role in your business security.

If they’re outdated, they can quietly become one of the biggest risks in your network.