Everything You Connect to Your Home Network Is Potentially Dangerous Connecting smart speakers, cameras, TVs, door locks, and light bulbs to your home network is dangerous because each new device gives attackers another chance to find and exploit vulnerabilities. Once an attacker controls your IoT device, they can use it to spy on you, grab your personal data, eavesdrop on your conversations, unlock your doors, and compromise connected devices.
How Iot Devices Have Become Such Easy Targets
Security is not top of mind for most IoT buyers and manufacturers. Most IoT products go straight from the factory to your home with little or no password change, may only receive security updates for a year or two, and leave you in the dark about what they’re transmitting and where.
Home IoT doesn’t get much attention from users because it just works. Rarely needed to look at or touch, smart cameras and thermostats can run undisturbed for years in some homes. The same can be said about hackers: Your IoT devices make perfect targets because they seldom get updated, monitored, or scrutinized by their owners.
Why Would Hackers Target My Smart Home?
The average smart home secures critical data behind consumer-grade security software, antivirus, and a single router. Attackers know this, so they scan for weak IoT devices and try to compromise your whole network by pivoting to less-secure devices on the same Wi- Fi network after gaining entry.
- Smart cameras can provide schedules, entry points, and information about who lives there.
- Voice assistants can expose someone’s Amazon or Google account.
- Smart plugs and thermostats can help determine when someone is home.
- Smart hubs with weak security can provide a pivot point into the rest of the network.
- Older firmware is easier to scan for because vulnerabilities are already known.
If they find a vulnerability that’s easy to exploit, they’ll exploit it. That could mean using a smart speaker or plug to gain persistence in the network and keep watch until a prime opportunity comes along.
Your Router May Not Be the Weakest Link
It’s rare for every smart device under one roof to become vulnerable. However, one weak smart device can serve as a conduit between the internet and whatever else is on the network, including PCs used for sensitive activities like work, banking, and children’s homework.
The following table highlights some common vulnerabilities for routers and IoT devices, along with their potential impacts and prevention measures.
| Weakness | Impact | Prevention | Notes |
| Default Credentials | Unauthorized access | Change username/password | Common in factory settings |
| Outdated Firmware | Exploitable vulnerabilities | Enable automatic updates | Critical for long-term security |
| Open Ports | Malware infections | Disable unused ports | Scan regularly for exposed ports |
| Weak Encryption | Data theft | Enable WPA3/strong encryption | WEP is obsolete for Wi-Fi |
These vulnerabilities highlight the importance of proactive steps in mitigating IoT and router risks.
Malware can travel from that vulnerable IoT device to your router or smart home hub and take over functionalities like traffic sniffing and browser redirection. Advanced malware can embed itself in a router to provide a backdoor that won’t be cleared by rebooting or factory resetting the device.
Convenience Features Can Also Create Vulnerabilities You Overlook
Some of the riskiest gaps in smart home security have nothing to do with technology. They are simply due to convenience. Homeowners love the convenience of factory default settings so much they rarely change them — and default security settings are deliciously low for a reason.
- Default usernames and passwords.
- Automatic updates getting turned off.
- Using the same account for multiple homes.
- Leaving remote access enabled on everything.
- Not fully removing device access from previous owners.
These weaknesses become IoT-wide problems because most hacking isn’t targeted. Attackers scan for default usernames and passwords, automatically applied configurations, and routers whose easiest route to hardening is through factory resets.
Simple Changes Can Dramatically Improve Iot Security
Securing your smart home doesn’t mean you have to give up the conveniences of IoT. It just means you shouldn’t connect risky devices to the same network you use for banking, email, and work. Beyond network segregation, every IoT device should earn its spot on your network.
- Use unique passwords and enable MFA whenever possible.
- Turn on automatic updates.
- Put IoT devices on guest network or segmented VLAN.
- Turn off unnecessary convenience features.
- Periodically review app permissions and revoke unnecessary access.
For example, if you really don’t need your TV to listen for the Amazon Alexa keyword, then turn the feature off. Many smart home vulnerabilities are easy to prevent by taking steps that most users blindly skip over during setup.
Segmenting Your Network Is the First Step to Protecting It
Network segmentation means separating devices into groups that can’t see each other. That way, if an attacker compromises your smart plug, they shouldn’t automatically gain access to files stored on your NAS or work laptop.
Network segmentation works for homes because the average IoT device only needs internet access and perhaps a companion mobile app. Most IoT devices don’t need to connect to sensitive devices and data stores on your network. Isolating them is simple and lowers the chance of a vulnerability on one device compromising your PC.
Upgrade Devices With Known Vulnerabilities & Weak Credentials
Smart home devices become vulnerable over time when manufacturers stop providing updates and webhooks. Even if your device was secure when you bought it, it can be compromised in the future if it connects to a cloud service that gets compromised.
Consider whether the IoT device still receives over-the-air firmware updates, uses two-factor authentication, and has unnecessary open ports and services exposed to the internet. Devices that answer no to more than one of these questions should be on your upgrade shopping list.
Look for Connected Devices With Unexpected Network Activity
You don’t need fancy tools to monitor your home network. The good news is when a smart refrigerator suddenly starts acting like a web server or malware command-and-control host, chances are you’ll notice too.
- Unexpected network behavior worth looking into include:
- • Unexpected increase or decrease in bandwidth usage
- • Failed login attempts
- • Unknown devices connecting to your network
- • Connections at odd times of the day
Bonus points if you can identify which devices are allowed on the network through a smartphone app or web interface. Some routers make this easier than others.
Taking Steps to Build a Secure Smart Home Today
Building a secure smart home takes time. Just as your network grows and changes, how you use it will change as you buy new devices or find creative ways to abuse old ones. Take the time to review what you have connected to your network every few months.
Remember that your network’s attack surface now extends to every device you connect to it. Double-check that everything connecting to your Wi-Fi is something you need and try to be mindful of networks you allow them to connect to while you’re away.
