Smart home device security comes down to a few habits: change every default password, keep firmware updated, put gadgets on their own network, switch off features you do not use, and buy from makers that still support what they sell. These steps make cameras, speakers, plugs and doorbells far harder to misuse.
Why smart devices need extra attention
A smart bulb or camera is a small computer on your home network. Unlike your phone, it often has no screen, offers few security options and may rarely receive updates. Attackers know this, and weak devices are easy to find and hard to notice when compromised.
The risks are practical. A badly secured camera might expose its video feed. A hijacked gadget might be used to attack other devices, or to snoop on traffic that is not encrypted. The aim is to make your devices dull targets.
Secure the network first
Everything depends on the router, so start there. Use strong WPA2 or WPA3 encryption, a long unique Wi-Fi passphrase and a changed router admin password. Our guides on securing your home router and on WPA2 and WPA3 cover the basics.
Use a separate network
Many routers offer a guest network or separate segments. Place smart devices there so they cannot easily reach your laptop, phone or file storage. Check that the guest network has client isolation enabled if your router provides that option. Some devices need to be on the same network as your phone for initial setup; you can usually move them afterwards or test whether they still work.
Lock down each device
- Change default credentials. Factory usernames and passwords are widely known. Choose a unique password for each device and store it in a manager; see password manager basics.
- Update firmware. Turn on automatic updates where available, and check manually for devices that lack them.
- Enable two-step sign-in on the accounts that control your devices, such as the companion app account.
- Disable what you do not use. Remote access, voice purchasing, guest sharing and universal plug and play features are common examples.
- Review the app’s permissions. The companion app often asks for location, contacts or microphone access it does not need.
Registering a device often creates a cloud account. Treat that account like any other important login, with a strong, unique password.
Cameras, speakers and microphones
Devices that watch or listen deserve stricter rules. Think about where they sit. A camera in a hallway watching the door is one thing; a camera in a bedroom is another. Many have a physical shutter or a mute switch, and using it when you want privacy is more reliable than trusting software.
- Check what is recorded, where it is stored and for how long. Some systems keep clips in the cloud, others locally.
- Look through the saved voice or video history in the companion app and delete what you do not need.
- Turn off any feature that shares recordings with the manufacturer for product improvement, if you prefer.
- Tell guests and household members about devices that record.
Laws on recording audio and video, especially of other people and public spaces, vary by country, so check the rules where you live before pointing a camera outward.
Smart home device security checklist
| Task | How often |
|---|---|
| Change default passwords on new devices | At setup |
| Move devices to guest or separate network | At setup |
| Check for firmware updates | Every month or two, if not automatic |
| Review app permissions and recording history | Every few months |
| Remove devices you no longer use | Whenever you replace something |
Buying and retiring devices
Before buying, look at how long the manufacturer says it will provide updates, whether the company explains how it handles security reports, and what the device does when its cloud service is unavailable. Very cheap products from unknown sellers often skimp on support.
When you sell or dispose of a device, perform a factory reset and remove it from your account first. Otherwise the next owner may inherit access, or your data might remain on the hardware.
Where a VPN fits
Most smart gadgets cannot run VPN software themselves. If you want their traffic protected, a router-level VPN can do it, as described in how to use a VPN on your router. Bear in mind that some devices stop working correctly behind a VPN, and that a VPN does nothing about weak passwords.
Living with a smart home day to day
Security is not a one-off job. When a new family member or housemate moves in, share access thoughtfully, giving them their own account rather than your password. When someone leaves, remove their access from the app. Check the list of authorised users and linked services now and then, because third-party integrations that you tried once may still hold permission to control your devices.
It also pays to ask whether each device needs to be smart. A door lock, camera or alarm that protects your home deserves far more scrutiny than a novelty lamp. If a feature adds convenience but also adds risk, you can reasonably decide to leave it off.
Where to start
Walk around your home and list every connected device. For each, change the default password, run any pending update and decide whether it truly needs internet access. Then move them to a separate network. For more help with phones, laptops and other gadgets, see our device security collection.
Frequently asked questions
Are smart home devices risky by default?
They are not unsafe by nature, but many ship with weak default settings and receive limited updates. Careful setup removes most of the avoidable risk.
Do I need a guest network for smart devices?
It is a good idea. Putting them on a separate network stops a compromised gadget from easily reaching your computers and phones.
What should I do with a device that no longer gets updates?
Consider replacing it, or at least disconnect it from the internet and use it only locally if it still works that way.
Can a VPN protect my smart devices?
Most smart devices cannot run a VPN app. A VPN on the router covers them, though it will not fix weak passwords or outdated firmware.
