Most offices have more connected devices than their IT setup accounts for. Smart TVs, IP cameras, printers, wireless access points, and building management systems all sit on the same network as your business data, usually with little thought given to security.
IoT security is a practical gap that affects businesses of every size. This guide covers which devices are most commonly at risk, how attackers use them, and what you can do to close the door.
What Counts as an IoT Device in Your Office?
The term “Internet of Things” covers any device that connects to your network but isn’t a traditional computer. In a typical SMB environment, that list is longer than most people realize:
- Wi-Fi routers and access points
- Network printers and multifunction devices
- IP security cameras and door access systems
- Smart TVs and video conferencing equipment
- HVAC and building management controllers
- Voice assistants and smart speakers
- Connected point-of-sale terminals
Each of these devices runs its own firmware and, in many cases, has an internet-facing interface. Any one of them can give an attacker a way into your network. Most don’t show up in standard endpoint monitoring tools either, which means they can sit unexamined for months or years.
Why IoT Security Is a Growing Concern for SMBs
The numbers are moving in the wrong direction. Research from Forescout, published in mid-2024 and covering nearly 19 million devices, found that one-third of IoT devices now carry active vulnerabilities, up from 14% just twelve months earlier. Wireless access points, routers, printers, VoIP systems, and IP cameras ranked among the most affected device types.
Attackers don’t need to breach your server directly. If they can access a compromised camera or printer on your network, they can use that foothold to reach more sensitive systems. Forescout’s research team built a working proof-of-concept attack that does exactly this. It enters through an IP camera, moves laterally through an IT workstation, and eventually takes down operational infrastructure, all without showing up in standard security tools.
That’s not a worst-case thought experiment. It reflects how these devices behave in a network and why most businesses don’t catch the problem until something goes wrong.
The Vulnerabilities Behind Most Smart Device Security Incidents
Most smart device security incidents don’t rely on sophisticated exploits. The weaknesses attackers target are usually far more straightforward:
Default credentials: Devices ship with generic usernames and passwords that most businesses never change. According to Nozomi Networks’ OT/IoT threat intelligence research, brute-forcing default SSH and Telnet credentials remains the top technique attackers use to gain access to IoT devices. It requires almost no skill to execute, and it works because so many devices stay on factory settings indefinitely.
Outdated firmware: Unlike laptops and servers, IoT devices rarely have automatic updates configured by default. Firmware that’s sitting months or years behind the latest patch is common in SMB environments, and attackers actively scan for known vulnerabilities in older versions.
Open ports and unnecessary services: Many devices ship with remote management features enabled that businesses don’t need. These open ports can make devices visible to internet-wide scanners without anyone in the business knowing.
No encryption in transit: Older IoT devices often transmit data in plaintext, meaning anyone on the same network segment can read it. This is a real concern if credentials or sensitive operational data passes through those devices.
The NIST Cybersecurity for IoT Program addresses each of these areas, with published guidance covering device identification, access controls, patching, and configuration management across enterprise IoT deployments.
Practical Steps to Strengthen Network Security for Your Business
You don’t need a dedicated security team to meaningfully reduce IoT risk. These steps are achievable for most SMBs:
Audit what’s on your network
Run a discovery scan or ask your IT provider to do one. You can’t protect devices you don’t know exist, and most businesses find more connected hardware than they expected.
Change default credentials immediately
Every device should have a unique, strong password set during initial configuration. This single step removes the most widely used attack method.
Segment your network
Placing IoT devices on a separate network segment (typically a VLAN) means that if one device is compromised, it can’t directly reach your servers, workstations, or financial systems. Network segmentation is one of the most effective SMB cybersecurity controls available and doesn’t require expensive hardware.
Apply firmware updates on a regular schedule
Many manufacturers publish firmware updates without notifying users. Set a quarterly reminder to check device manufacturer pages for available patches.
Disable what you don’t use
If a device has remote access or UPnP features you don’t need, disable them. Fewer active services mean a smaller attack surface.
Keep a device inventory
A simple spreadsheet covering each connected device (make, model, firmware version, and who’s responsible for it) makes future audits and incident response far more manageable.
How Managed Security Services Protect What Standard IT Misses
Taking care of the basics matters, but it only gets you so far. Keeping a consistent watch over IoT device behavior requires tools most SMBs don’t have in-house. A printer making unexpected outbound connections or a camera suddenly querying unusual IP addresses won’t show up in a standard helpdesk ticket. Without the right monitoring in place, you may not find out until after the fact.
This is where managed security services make a practical difference. A provider watching your environment around the clock can catch unusual device behavior early, push firmware updates as they’re released, and make sure your network segmentation holds up as your team grows and your hardware changes. No single tool handles this passively; it takes ongoing, expert attention.
At Cyber Express, we help businesses get a clear picture of their full network exposure, including the connected devices that often fall outside a standard IT review. If you’d like to know exactly where your vulnerabilities sit, get in touch for a no-obligation conversation.
