A thorough IoT pentest is the only reliable way to ensure your connected devices are safe from cybercriminals.
A smart thermostat might seem harmless. A connected security camera appears to be a basic operational tool. But to a cybercriminal, these devices represent an unguarded backdoor into your network.
We surround ourselves with internet-connected hardware. Just think about what you use every day.
- Smart sensors in manufacturing plants.
- Connected badge readers in our offices.
- Internet-enabled medical equipment in hospitals.
This massive increase in connected hardware creates a vast attack surface. And attackers know that businesses often forget to secure these physical endpoints.
Securing these endpoints requires a highly specialised approach. You can’t just run a software scanner over a physical device. You need experts who know how to dismantle hardware, extract internal code, and intercept radio signals.
Let’s explain how a manual hardware security audit actually works.
Why an IoT Pentest Is Essential for Modern Business
Many organisations focus their security budgets only on their websites and cloud setups. They build strong firewalls and train their staff to recognise malicious emails. Then assume this covers their entire risk profile.
This leaves a massive blind spot.
Cybercriminals look for the easiest way in. If your main servers are highly secure, they won’t attack them directly. A connected printer or a smart lighting controller often provides a much weaker entry point.
Manufacturers design these devices for speed and convenience, not security. Devices often ship with outdated software and use unencrypted communication signals. They almost always include default administrative passwords.
When you connect a vulnerable device to your corporate network, you build a bridge for hackers. An attacker can compromise the smart device from the internet.
Once they control the device, they’re inside your network. Then, they can move sideways to access your databases or deploy ransomware.
A manual IoT pentest finds these weak bridges before attackers do.
Moving Beyond Standard Software Security
Testing physical hardware is vastly different from testing a standard web application.
A web application lives on a server. You test it over the internet without ever needing physical access to the server room.
Connected hardware is completely different, as the device is in the hands of the user. An attacker can buy the same device you use in your office. They can take it apart with a screwdriver and connect wires directly to the internal circuit board.
Standard security consultants often struggle here. They lack the electrical engineering knowledge required to analyse circuit boards. These consultants also don’t know how to intercept Bluetooth signals or radio frequencies.
To properly secure connected hardware, you need a team that understands both digital code and physical electronics.
The Three Attack Surfaces in an IoT Pentest
A professional security audit evaluates the entire device ecosystem. We look at three distinct attack surfaces: 1) the physical hardware, 2) the internal firmware, and 3) the communication layers.
The Physical Hardware Layer
The physical hardware layer is the actual device you hold in your hand. This includes the plastic casing, the circuit board, and the physical connecting ports. When an attacker gains physical access to a device, your risk increases dramatically.
Our security experts begin by opening the device casing to look for hidden diagnostic ports. Manufacturers use these ports to test the electronics during assembly but can forget to disable them.
We connect diagnostic tools to these hidden ports. Think of these ports as a mechanic's diagnostic panel under a car's dashboard. If these ports are active, we can bypass the device login screen entirely.
We also copy data directly from the memory chips. We frequently find sensitive information stored in plain text, including Wi-Fi passwords and encryption keys.
The Internal Firmware Layer
Firmware is the operating system that makes the device function. Unlike a standard laptop, you can’t just browse the files on a smart device. The firmware is tightly packed into a single digital file.
During a code audit, we first extract a copy of this firmware. We might pull it directly from the memory chips or intercept it while the device downloads an update.
Once we have the file, we perform reverse engineering. We take the compiled code apart to see how it works. We often find hardcoded passwords hidden deep inside. If an attacker finds these hidden passwords, they can access every single device of that specific model.
We also check for outdated, open-source software libraries that need immediate patching.
The Communication and Cloud Layer
A smart device is useless if it can’t communicate. It must talk to a mobile application, a local control hub, or a cloud server. This communication layer is highly vulnerable.
Many devices use standard Wi-Fi, while others use Bluetooth or specialised radio frequencies. We test these communication methods by setting up physical antennas to capture the travelling signals.
- We check if the device encrypts the data before sending it. Many devices still send sensitive information in plain text.
- We also scrutinise the application programming interfaces (APIs). These are the digital pathways the device uses to talk to the cloud.
- We intercept the requests sent to the cloud to see if the server validates them properly.
Securing this layer ensures your data remains private.
Translating Hardware Risks into Business Threats
Understanding the technical details is important, but you must also understand the business risks. A vulnerable smart device is a severe corporate liability.
Do you manufacture connected devices? A security flaw in any of them will severely damage your brand reputation and open you up to litigation.
But if one of the devices you use leaks personal user data, you face massive regulatory fines under privacy laws like GDPR.
If you use connected devices in your business, the risk is highly operational. A compromised sensor can halt a production line. A vulnerable smart television in a boardroom enables attackers to listen to confidential meetings.
A manual security audit translates complex hardware vulnerabilities into clear business impacts. This way you can treat security as a vital business investment.
How We Secure Your Physical Network
Securing modern infrastructure requires a partner who understands hardware, software, and cloud infrastructure. At 7ASecurity, we provide this expertise.
We:
- Use manual, expert-driven techniques to test your devices.
- Dismantle the hardware, reverse engineer the firmware, and intercept the radio signals.
- Offer specialised security training to help your internal teams understand these attack vectors.
- Provide clear, concise reports without false alarms.
- Explain the steps to reproduce the vulnerability and offer practical guidance on how to fix it.
- Offer a free fix verification bonus. Once your developers apply the necessary patches, we retest the device to confirm the vulnerability is closed for good.
Frequently Asked Questions About Connected Device Security
Why are default credentials so common in IoT devices?
Manufacturers prioritise fast production. Creating a unique, random password for every single device takes significant time and money. It’s much cheaper to tell every customer to use "admin" as the password and change it.
Attackers compile lists of these default credentials to take over thousands of devices globally in minutes.
Can a compromised IoT device infect other systems on the same Wi-Fi network?
Yes. This attack technique is known as lateral movement. If an attacker breaches a smart lightbulb, they completely bypass your external firewall. They then use the lightbulb to scan your internal network for unpatched laptops or vulnerable databases.
What’s firmware reverse engineering?
Firmware is compiled into machine language (ones and zeros) before it goes onto the device.
Reverse engineering translates those ones and zeros back into a format that a security researcher can read. We use specialised software to see exactly how the device processes data and handles passwords.
How do updates work for IoT devices that lack a user interface?
Most modern devices use over-the-air updates. The device connects to a cloud server in the background to check for new firmware. If the device doesn’t verify the digital signature of the update file, an attacker can force the device to download malicious software.
Do we need an IoT pentest if we already test our web apps?
Yes. Web application testing only evaluates the software hosted on your servers. It ignores the physical hardware, the internal device memory, and the local radio frequencies used by the device. You need a dedicated IoT pentest to secure those specific areas.
What industries face the highest risk from connected devices?
Healthcare, manufacturing, and critical infrastructure face massive risks. Compromised medical devices impact patient safety, while vulnerable industrial sensors can shut down entire production lines. Yet any modern office using smart cameras or access IDs is also a potential target.
Secure Your Physical Endpoints Today
Securing connected devices requires looking beyond the screen and testing the physical and digital components as a single unit. Your physical endpoints demand the same level of rigorous testing as your cloud infrastructure.
Let’s test your hardware before hackers do.
