IoT security myths are quietly putting millions of homes and businesses at risk, and most people don’t realize it until something goes wrong. From smart cameras to connected thermostats, the average household now runs dozens of internet connected devices, yet most owners still believe outdated or simply false ideas about how safe those devices actually are. This article breaks down the most common IoT security myths, explains what experts actually say instead, and gives you practical steps to close the gap.
Table of Contents
- Myth 1: Small Devices Aren’t Worth Hacking
- Myth 2: Built In Security Is Enough
- Myth 3: Antivirus Software Protects IoT Devices
- Myth 4: Changing the Default Password Once Is Enough
- Myth 5: My Home Network Is Too Small to Target
- Myth 6: IoT Devices Get Security Updates Automatically
- Myth 7: A Firewall Alone Stops IoT Attacks
- Myth 8: IoT Risk Is Only a Business Problem
- Myth 9: Unplugging an Unused Device Fixes Everything
- What Real IoT Attacks Actually Look Like
- Why Endpoint Security Tools Don’t Cover IoT
- The Role of Password Managers and Multi Factor Authentication
- Why Vulnerability Assessments Matter for IoT
- Secure Remote Access for Connected Devices
- Building Real Cyber Security Awareness Around IoT
- How to Actually Secure Your IoT Devices
- Frequently Asked Questions
- Get Your Network Professionally Assessed
Myth 1: Small Devices Aren’t Worth Hacking
Many people assume a smart plug or a connected thermostat is too insignificant for an attacker to bother with. The reality is that attackers rarely care about the device itself. They care about what it’s connected to. Once compromised, a small device becomes an entry point into the rest of your network, and a stepping stone toward more valuable targets like computers, cameras, or business systems.
Expert reality: According to the NIST Cybersecurity for IoT program, even minimal, low power devices can be recruited into larger attacks because attackers value network access and scale, not the individual device’s worth.
Myth 2: Built In Security Is Enough
Manufacturers often market devices as “secure by design,” which leads buyers to assume no further action is needed. In practice, built in protections vary wildly between brands, and many budget devices ship with outdated firmware, weak default configurations, or no meaningful encryption at all.
Expert reality: The OWASP Internet of Things Project consistently lists insecure default settings and lack of update mechanisms among the top risks across consumer IoT devices, regardless of manufacturer claims.
Myth 3: Antivirus Software Protects IoT Devices
Antivirus software is designed for full operating systems like Windows or macOS, not the stripped down firmware running on most IoT devices. There is often no antivirus equivalent installed, and no practical way to install one, on a smart bulb, doorbell camera, or connected sensor.
Expert reality: This is precisely what is an IoT network experts mean when they say IoT security has to happen at the network level, not the device level, since most devices simply cannot run traditional endpoint protection.
Myth 4: Changing the Default Password Once Is Enough
Changing a default password is an important first step, not a finish line. Weak or reused passwords, combined with the fact that many devices never receive further password related hardening, still leave the door open long after that first change.
Practical action: Use unique, strong credentials per device, ideally generated and stored through a password manager, and where possible, enable multi factor authentication on the companion app controlling the device.
Myth 5: My Home Network Is Too Small to Target
Attackers don’t manually target individual homes one by one. They run automated scans across the entire internet looking for exposed devices with known vulnerabilities or default credentials. Your network doesn’t need to be interesting to be found. It just needs to be exposed.
Expert reality: This automated, at scale targeting is exactly how the Mirai botnet compromised hundreds of thousands of devices in 2016, not through targeted attacks, but through mass scanning for weak, default configurations.
Myth 6: IoT Devices Get Security Updates Automatically
Some devices do update automatically, but a large share of consumer IoT hardware receives infrequent updates, or stops receiving them entirely once a product is discontinued, sometimes while it’s still actively being sold and used.
Practical action: Check the manufacturer’s update policy before buying, and periodically confirm your existing devices are still receiving firmware updates as part of routine patch management.
Myth 7: A Firewall Alone Stops IoT Attacks
A firewall is a critical layer, but it is not a complete solution. Firewalls primarily control traffic entering and leaving a network. They do little to stop a compromised device from communicating with other devices already inside that same network.
Expert reality: This is why real network security relies on network segmentation, keeping IoT devices on a separate network from computers and sensitive systems, so a single compromised device can’t freely reach everything else.
Myth 8: IoT Risk Is Only a Business Problem
IoT risk is often framed around industrial sensors and enterprise deployments, but consumer devices carry real risk too. Smart cameras, baby monitors, and voice assistants sit inside homes collecting audio, video, and behavioral data, all of which becomes a target the moment a device is compromised.
Practical action: Treat home network security with the same seriousness as business network security, since both a network security assessment and basic household hygiene matter regardless of scale.
Myth 9: Unplugging an Unused Device Fixes Everything
Powering down an idle device does remove it as an active risk while it’s off, but it doesn’t fix the underlying vulnerability. The moment it’s reconnected, whatever configuration or firmware issue existed before is still there.
Practical action: Fix the root cause (update firmware, change credentials, adjust network placement) rather than relying on unplugging as a long term strategy.
What Real IoT Attacks Actually Look Like
The Mirai botnet remains the clearest real world proof that these myths carry real consequences. In 2016, malware scanned the internet for IoT devices still using factory default usernames and passwords, compromised hundreds of thousands of them, and used that combined network to launch massive distributed denial of service (DDoS) attacks that disrupted major internet services. Since then, security researchers have documented ongoing waves of similar campaigns targeting cameras, routers, and other connected devices using the exact same default credential weakness.
These aren’t rare, sophisticated operations. They rely almost entirely on the myths above: default passwords left unchanged, no meaningful network segmentation, and an assumption that a small device isn’t worth securing properly.
Why Endpoint Security Tools Don’t Cover IoT
Businesses often assume their existing endpoint security stack already covers connected devices, since it protects laptops, servers, and phones. This assumption is one of the more dangerous IoT security myths in a corporate setting. Endpoint security agents require an operating system capable of running background processes, logging, and remote management, which most IoT firmware simply cannot support.
Free endpoint security software and enterprise grade platforms alike are built around this same assumption, which leaves a visibility gap around cameras, sensors, badge readers, and other connected hardware. This gap is exactly where attackers look first, because it’s the part of the network least likely to be monitored by a security team.
The Role of Password Managers and Multi Factor Authentication
A recurring theme across almost every IoT security myth is the underestimation of basic credential hygiene. Reused or weak passwords remain one of the most common ways attackers gain initial access to a connected device or its companion app.
A password manager removes the excuse of reusing the same password across multiple devices and accounts by generating and storing a unique, strong credential for each one. Layering multi factor authentication on top, particularly for the mobile apps that control your smart devices, adds a second barrier that stops most automated, credential based attacks even if a password is eventually exposed elsewhere.
Why Vulnerability Assessments Matter for IoT
Most vulnerability assessment programs were originally built around servers, laptops, and web applications, not smart plugs or connected sensors. As IoT adoption has grown, that gap has become a real liability, since an unassessed device can sit on a network for years without anyone realizing it’s running outdated, vulnerable firmware.
A proper vulnerability assessment should explicitly include every connected device on a network, not just traditional endpoints, and should be repeated on a regular schedule rather than treated as a one time exercise. For businesses, this is typically where a professional network security assessment becomes essential, since it identifies exposed or outdated IoT devices that internal teams frequently overlook.
Secure Remote Access for Connected Devices
Many smart devices are designed to be controlled remotely, whether that’s checking a security camera from a phone or adjusting a thermostat while away from home. This convenience depends entirely on secure remote access being configured correctly.
Features like UPnP, which automatically opens ports on a router to allow remote connections, are convenient but frequently exploited, since they can expose a device directly to the internet without the owner realizing it. Reviewing exactly which devices have remote access enabled, and disabling it for anything that doesn’t genuinely need it, closes off one of the more common entry points attackers rely on.
Building Real Cyber Security Awareness Around IoT
Most cyber security awareness training focuses on phishing emails and password hygiene for traditional accounts, while barely mentioning connected devices at all. This is a significant gap, since employees and family members alike are usually the ones purchasing and setting up new smart devices without realizing the security implications.
Effective awareness training should explicitly cover IoT specific risks: checking a device’s update policy before purchase, avoiding default credentials, and understanding that a smart device is a full computer on the network, not just an appliance. This is especially important in workplaces where employees may connect personal smart devices to a corporate network without formal approval.
How to Actually Secure Your IoT Devices
- Change default credentials immediately and use unique passwords per device, managed through a password manager
- Enable multi factor authentication on companion apps wherever it’s supported
- Keep firmware updated as part of a regular patch management routine, and retire devices that no longer receive security updates
- Separate IoT devices onto their own network segment, away from computers and business systems
- Disable unused features like remote access or UPnP unless you specifically need them
- Monitor your network for unusual device behavior using network monitoring tools
- Periodically review which devices are actually still connected and remove ones you no longer use
- For businesses, include every connected device in a formal vulnerability assessment, not just traditional endpoints
Frequently Asked Questions
Is IoT security really a serious risk, or is it overblown?
It’s a genuine risk. Real incidents like the Mirai botnet demonstrate that IoT vulnerabilities have caused large scale, real world disruption, not just theoretical concern.
Can smart home devices actually be hacked?
Yes. Cameras, routers, and other connected devices are frequently targeted through default credentials and outdated firmware, both of which are common and often easy for attackers to exploit at scale.
Do I need antivirus for my smart devices?
Traditional antivirus generally doesn’t run on IoT hardware. Protection instead comes from strong credentials, updated firmware, and proper network segmentation.
Is changing the default password enough to secure a device?
It’s a critical first step, but not sufficient on its own. Firmware updates, network placement, multi factor authentication, and ongoing monitoring all matter too.
Are cheaper smart devices less secure than expensive ones?
Not always, but budget devices are statistically more likely to skip regular firmware updates and ship with weaker default configurations, so it’s worth checking a manufacturer’s update history before buying.
What is an IoT botnet?
It’s a network of compromised, internet connected devices controlled remotely by an attacker, often used to launch large scale attacks like DDoS campaigns, as seen with Mirai.
Does endpoint security software protect smart devices?
Generally not. Most endpoint security tools require a full operating system to install an agent, which the majority of IoT firmware doesn’t support, leaving these devices as a blind spot for many security teams.
How can a business properly evaluate its IoT and network exposure?
A structured network security assessment is the most reliable way to identify exposed devices, weak segmentation, and other IoT related risks across your environment.
Get Your Network Professionally Assessed
Believing the right things about IoT security is only half the battle. Knowing exactly which devices on your network are actually exposed is the other half, and that requires more than a checklist. If your business relies on connected devices, sensors, or smart infrastructure, it’s worth finding out where your real risk sits before an attacker does.
Book a network security assessment with Nexus Web Security today
