The Risks Posed by IoT Devices
Smart speakers, network cameras, smart locks, smart appliances — internet-connected devices are rapidly proliferating in our living spaces. While these IoT (Internet of Things) devices make life more convenient, they also introduce new security risks.
Unlike traditional computers and smartphones, many IoT devices receive infrequent security updates and lack the processing power to run antivirus software. For attackers, IoT devices are prime targets as entry points into home networks.
Common Attacks on IoT Devices
Exploiting Default Passwords
Many IoT devices ship with factory-set passwords like "admin/admin" or "admin/password." If these are never changed, attackers can easily gain access. The Mirai botnet, which caused massive DDoS attacks in 2016, exploited precisely this vulnerability.
Firmware Vulnerabilities
Even when vulnerabilities are discovered in IoT device firmware, manufacturers may not release updates — or users may not apply them. Unpatched vulnerabilities become permanent entry points for attackers.
Eavesdropping and Privacy Violations
If a device equipped with a microphone or camera is compromised, private conversations and video footage from inside the home could be leaked externally. Cases of unauthorized access to smart speakers and baby monitors have been documented.
Essential Steps to Secure Your Home Network
Strengthen Your Router's Security
The router is the cornerstone of your home network. Verify the following settings:
- Change the router's admin password from the default
- Update the firmware to the latest version
- Encrypt your Wi-Fi with WPA3 (or at minimum WPA2)
- Disable remote management
- Disable UPnP (Universal Plug and Play)
Isolate IoT Devices on a Separate Network
Many home routers support a guest network feature. By connecting IoT devices to the guest network and keeping your computers and smartphones on the main network, you can limit the impact if an IoT device is compromised.
Change the Password on Every Device
Change the default password on all IoT devices and set a strong, unique password for each. Enable two-factor authentication where available.
How to Choose IoT Devices
Here are criteria for selecting IoT devices with security in mind:
- Choose products from manufacturers that provide regular firmware updates
- Prefer devices with automatic update capabilities
- Select products with clear privacy policies and transparent data handling practices
- Choose devices that allow you to physically disable unnecessary features (microphone, camera, etc.)
- Select products with a clearly stated end-of-support date
Disposing of IoT Devices You No Longer Use
When discarding or giving away an IoT device, always perform a factory reset. If Wi-Fi passwords, account credentials, and usage history remain on the device, that information could end up in the hands of the next owner or anyone who recovers the discarded hardware. Also remember to revoke any cloud service integrations.