The Office Network Nobody Checks: Securing Routers, Printers, and Forgotten Devices

An office can have updated laptops, antivirus software, strong passwords, and a firewall, yet still have security gaps hiding in plain sight. A router installed several years ago, a printer that has not received a firmware update, or a small network device connected during a temporary project can quietly become a weak point in the company's security.

These devices rarely attract the same attention as employee computers or business applications. Once they are installed and working, they often fade into the background. The router continues distributing internet access, the printer keeps handling documents, and the network switch sits in a cabinet doing its job. Unless something stops working, nobody may think to check them. That is precisely why they deserve attention.

Cybersecurity is not just about protecting the devices employees use every day. It is also about securing the infrastructure that connects those devices, moves business information and keeps the office running.

The Devices That Keep Working Without Being Checked

Consider a typical office. Employees connect to the company network through wireless access points and routers. Printers receive documents from multiple departments. Network switches connect desktops, servers and other equipment. CCTV cameras, access-control systems, meeting-room displays and smart devices may also communicate across the same infrastructure.

Each device serves a purpose, but each can introduce a security risk if it is poorly configured, outdated or no longer monitored. The problem is often not that a business deliberately ignores its network. It is that responsibility becomes unclear. The IT team may know which laptops have been issued and which software needs updating, but nobody has a complete list of every device connected to the network. Some equipment may have been installed by an external vendor. Other devices may have been added to solve a temporary problem. A printer might still be using the administrator password set during installation, while an old wireless access point remains active after the office layout has changed. Over time, these small oversights accumulate. The network continues to function, creating a sense of security that may not reflect its actual condition.

Your Router Is More Than an Internet Connection

For many businesses, the router is something people notice only when the internet stops working. Yet it plays a critical role in managing traffic between the office network and external systems.

If a router is running outdated firmware, using weak administrative credentials or exposing management services unnecessarily, an attacker may be able to exploit those weaknesses. Depending on the device and its configuration, a compromise could allow unauthorized changes to network settings, traffic redirection, disruption of connectivity, or a foothold for further attacks.

The risk becomes more serious when the device is directly exposed to the internet or has management interfaces accessible from untrusted networks. Devices that have reached the end of manufacturer support are particularly concerning because newly discovered vulnerabilities may never receive fixes.

Securing a router starts with a few basic questions. Is the firmware still supported and up to date? Have default administrator credentials been replaced? Is remote management disabled unless there is a clear business need? Are administrative connections restricted to authorized systems or trusted management networks?

Businesses should also review the wireless configuration. Modern, supported encryption should be enabled, and access for visitors or personal devices should be separated from the main business network wherever practical.

These checks may seem routine, but they can make a meaningful difference. Security agencies continue to warn that vulnerable and poorly configured network-edge devices are targets for attackers. Routers should therefore be managed as critical security assets, not treated as equipment that only needs attention when it fails.

The Office Printer That Knows More Than You Think

Printers are among the most overlooked devices in business environments. They are often shared across departments and left connected to the network for years. Because they are not usually thought of as computers, their security settings may receive little attention. Modern multifunction printers can store documents temporarily or retain data on internal storage. They may support email delivery, scan-to-folder features, address books, remote administration, and other integrations with business systems. Depending on the model and configuration, they may also contain saved network credentials or information about documents that have been processed.

Imagine an employee printing a confidential customer contract or payroll report. If the printer is poorly secured, documents could be left in an output tray, stored longer than expected, or exposed through an insecure management interface. In some environments, a compromised printer may also provide an attacker with a route to explore other systems on the same network. The solution is not to stop using network printers. It is to manage them with the same care given to other connected equipment.

Administrator credentials should be changed from their defaults, and printer firmware should be updated using the manufacturer's supported process. Unused services and protocols should be disabled after checking that business workflows do not depend on them. Administrative access should be restricted, and sensitive printing can be protected with PIN release or user authentication where supported.

Businesses should also review scan-to-email and scan-to-folder settings. These features are useful, but they must be configured carefully so that documents are delivered only to approved destinations. If a printer is replaced or retired, its stored data and configuration should be securely cleared according to the manufacturer's guidance before disposal or reuse. A printer may not be the first device that comes to mind during a security review. That does not make it any less important.

Forgotten Devices Create Forgotten Risks

Routers and printers are familiar examples, but the wider problem involves every device that connects to the office network. A spare wireless access point may remain plugged in after a network upgrade. An old CCTV recorder might use unsupported software. A meeting-room device may retain a default password. A vendor could have installed a small appliance for remote maintenance and left it connected after the project ended.

Individually, these devices may appear insignificant. The risk depends on what they can access, how they are configured, and whether an attacker can reach or exploit them. A forgotten device becomes particularly concerning when nobody knows who owns it, why it is connected, or whether it still receives security updates. Without that information, the IT team may not know when to patch it, how to investigate suspicious behaviour, or whether it should be removed entirely.

This is why maintaining an accurate device inventory matters. Businesses should record network equipment and connected devices, including their location, model, firmware or software version, support status, responsible owner, and business purpose. The inventory should be updated whenever equipment is installed, replaced, moved, or retired. Network discovery tools and monitoring systems can help identify devices that are communicating on the network but do not appear in the inventory. Any unknown device should be investigated before it is trusted. If it cannot be identified or justified, access should be restricted while the team determines the appropriate next step.

The goal is simple: Every connected device should have a known purpose, an accountable owner, and a defined security process.

One Network Should Not Automatically Trust Everything

Another common weakness is placing too many devices on the same network with little separation between them.

In a small office, employees' computers, printers, guest phones, CCTV cameras and other connected equipment may all share the same network. This can be convenient to manage, but it may also allow a compromised device to communicate with systems it has no business accessing.

For example, if an attacker gains control of a poorly secured camera, the consequences should ideally remain limited to that device and the services it legitimately needs. If the camera can communicate freely with employee workstations or sensitive servers, the potential impact is much greater.

Network segmentation helps reduce this exposure. Businesses can use separate network segments or VLANs for staff systems, guest Wi-Fi, printers, surveillance equipment, and other device categories, depending on their size and infrastructure. Firewall rules and access-control policies should then restrict communication to what is actually required.

Segmentation is not simply a matter of creating separate network names. The underlying routing and firewall rules must enforce the intended restrictions. IT teams should test those controls to ensure that devices cannot reach sensitive systems unnecessarily.

For smaller organizations, this does not have to begin with a complete network redesign. Even a carefully configured guest network and a separate segment for selected IoT devices can improve isolation. The right approach depends on the business, its equipment and the services employees need to access. The important principle is that connecting to the office network should not automatically grant a device broad access to everything else.

Updates, Passwords and Settings Still Matter

Many device-related security issues come from basic maintenance being overlooked. A device may be physically secure inside the office but still vulnerable because its software is outdated or its administrative interface is poorly protected.

Network equipment should be checked regularly for manufacturer security updates. Where automatic updates are supported and appropriate, organizations should configure them carefully. Otherwise, the IT team needs a documented process to review releases, assess risk, apply patches and confirm that devices remain functional afterwards. Passwords require similar attention. Default credentials should be replaced with strong, unique passwords, and administrative accounts should be limited to people who genuinely need them. Where supported, multi-factor authentication should be enabled for management access. Credentials should be stored securely rather than written on labels attached to equipment or shared informally among staff.

Businesses should also disable unused management interfaces, services and protocols. Features that are no longer needed increase complexity and may create additional ways for an attacker to interact with a device. Remote administration should be restricted to approved access paths, rather than exposed directly to the internet for convenience. It is equally important to identify equipment that has reached end of support. If a manufacturer no longer provides security fixes, the business should assess the exposure and plan a replacement or suitable isolation measure. An unsupported device should not remain on the network indefinitely simply because it still works. A device that turns on successfully is not necessarily a secure device.

Security Needs Visibility, Not Just Configuration

Even a well-configured network can develop problems over time. A new device may be connected without approval, a configuration may change, or an attacker may attempt to access a management interface. This is where monitoring becomes important.

IT teams should review available logs from routers, firewalls, switches, wireless access points, and other critical devices. Depending on the equipment, useful signals may include repeated failed login attempts, unexpected configuration changes, unusual outbound connections, unfamiliar devices joining the network, and management access from unexpected locations. Where practical, logs should be forwarded to a central monitoring platform so that important events are not lost when a device is compromised or its local logs are erased. Alerts should be configured for events that warrant investigation, and someone should be responsible for reviewing them.

Monitoring should also include periodic checks of the device inventory. If a device appears on the network that is not recognized, the team should establish what it is, who authorized it and what access it needs. Similarly, if a device disappears, the team should confirm whether it was intentionally removed or replaced. The objective is not to generate endless alerts. It is to give the IT team enough visibility to notice meaningful changes and respond before a minor issue becomes a larger incident.

Building a Practical Network Security Routine

Securing overlooked devices does not have to begin with expensive hardware or a complicated security programe. A consistent process is often the most useful starting point.

First, identify the devices connected to the network. Include routers, switches, access points, printers, cameras, smart devices and equipment managed by external vendors. Confirm the purpose of each device and identify who is responsible for it.

Next, review the highest-risk equipment. Internet-facing routers and firewalls, unsupported devices, systems with default credentials and equipment that can access sensitive business systems should receive particular attention. Update firmware, strengthen authentication and restrict unnecessary access according to the device's capabilities.

Then, check how devices communicate. Separate guest access from business systems, limit unnecessary connections between device categories and ensure that management interfaces are reachable only through approved paths.

Finally, make the process repeatable. Schedule regular reviews of device inventories, firmware status, administrative access, configuration changes and security logs. Include network devices in procurement, onboarding, change management and secure disposal procedures so that new equipment does not become an unmanaged exception. The exact frequency should reflect the business's risk, equipment and operational needs. Critical devices may need more frequent checks, especially when security advisories identify actively exploited vulnerabilities.

For smaller businesses without dedicated network security staff, an IT service provider can help assess device exposure, establish a baseline configuration and develop a manageable maintenance schedule.

The Smallest Device Can Become a Bigger Business Problem

Cybersecurity incidents do not always begin with an employee clicking a suspicious link or opening a malicious attachment. Sometimes, the weakness is a device that has been sitting quietly in a network cabinet for years.

A neglected router, an unsecured printer or an unknown connected device may provide an opportunity for unauthorized access. If that opportunity is left unchecked, the resulting incident could affect business data, interrupt operations or create additional recovery costs.

The answer is not to distrust every device. It is to stop treating familiar equipment as automatically safe.

Every connected device should be identified, maintained, monitored and given only the access it needs. Routers should be secured as gateways into the network. Printers should be managed as information-processing systems. Older and forgotten equipment should be reviewed rather than allowed to remain indefinitely.

At Forefront Technology, the broader lesson is clear: protecting a business means looking beyond the obvious endpoints. A secure office network is built not only by protecting the computers employees see every day, but also by checking the infrastructure and devices they rarely think about.

Because the device nobody checks can become the device that puts the entire network at risk.