How to Secure Your Smart Home Devices

Last updated: November 2, 2026 · By Ryan Mitchell

Smart home security means protecting connected devices such as cameras, door locks, thermostats, and voice assistants from being hacked, misused, or used as a way into the rest of your home network. The most effective steps are the simplest: secure your router, replace default passwords, turn on two-factor authentication, keep firmware updated, put devices on a separate guest network, and turn off features you don’t use. You don’t need technical training to do any of this, and most steps take less than an hour.

Key Takeaways

• The Cybersecurity and Infrastructure Security Agency (CISA) identifies the home router as the main entry point attackers use to reach connected devices.
• CISA recommends changing a router’s factory-set username and password and enabling multi-factor authentication on your accounts.
• The National Institute of Standards and Technology (NIST) published its final consumer IoT baseline, NIST IR 8425, in September 2022.
• Connecting smart devices to a guest Wi-Fi network keeps them from finding other devices on your network or reaching router settings.
• Features added for convenience, such as remote access and always-on connectivity, can increase exposure, so disable any you don’t need.

What Are the Main Risks of Smart Home Devices?

The main risks are unauthorized access, data exposure, and devices being used as a way into your home network. Smart home devices, which are internet-connected gadgets often called Internet of Things (IoT) devices, usually collect data about your daily routines and must stay online to work. Each connection is a potential path for an attacker if the device is poorly configured or outdated.

CISA advises owners to review device security settings, because features added for convenience can increase exposure to attack. The agency also recommends limiting continuous internet connectivity when it isn’t needed. Many risks come from settings you can change rather than from unavoidable design flaws.

What Are the Most Common Weak Points?

The most common weak points are default passwords, outdated firmware, an unsecured router, and unused features that remain switched on. Attackers often target devices that still use the password they shipped with, since those passwords are widely known. Devices that no longer receive updates also stay exposed to known vulnerabilities.

How Do You Create Strong Passwords for Smart Devices?

Use a unique, long password for every device account, and turn on two-factor authentication wherever it is offered. Two-factor authentication (2FA) requires a second verification step, such as a code from an authentication app, in addition to your password. Even if a password leaks, an attacker generally can’t log in without that second step.

• Change the default password on every device as soon as you set it up.
• Aim for at least 12 characters, mixing letters, numbers, and symbols.
• Avoid personal details such as birthdays, pet names, or addresses.
• Use a password manager to generate and store a different password for each account.
• Turn on two-factor authentication in the manufacturer’s app, and prefer an authentication app over text messages when both are available.

Protect the email account linked to your smart home apps too. If an attacker controls that inbox, they can often reset device passwords, so use a strong unique password and 2FA on it first.

Why Do Smart Home Devices Need Regular Updates?

Smart home devices need regular updates because manufacturers release firmware and app patches that fix known security flaws. Outdated firmware may lack protections against newer threats, which leaves a device open even if its settings are correct. Installing updates promptly is one of the highest-value steps you can take.

Turn on automatic updates in each device’s app whenever the option exists. If automatic updates aren’t available, check the app or manufacturer website monthly and install patches when they appear.

How Do You Check Update Support Before Buying?

Before buying a device, check how long the manufacturer has committed to providing security updates. NIST’s consumer IoT baseline, NIST IR 8425, defines the security capabilities consumer devices commonly need, such as secure updates and unique credentials. Looking for those capabilities on a product page, and confirming the support period, helps you avoid devices that will be abandoned.

How Do You Secure Your Router and Wi-Fi Network?

You secure your Wi-Fi network by changing the router’s admin login, using WPA3 encryption, and keeping its firmware current. CISA’s tip sheet names the home router as the main entry point attackers use to reach connected devices, so it deserves the most attention. Your router controls everything else on your network.

1. Log in to your router’s admin page and change the factory-set username and password.
2. Turn on WPA3 encryption if your router supports it. If it doesn’t, use WPA2 with a long, unique Wi-Fi passphrase.
3. Disable WPS (Wi-Fi Protected Setup), a convenience feature that attackers have exploited to guess PINs.
4. Check the router’s firmware and install any available updates, or enable automatic updates if offered.
5. Review UPnP (Universal Plug and Play) settings. CISA warns that UPnP can let attackers control devices remotely, so turn it off unless you specifically need it.
6. Enable two-factor authentication on the router manufacturer’s account if that option exists.

In the CISA tip sheet from National Cybersecurity Awareness Month 2019, the agency recommends changing the router’s factory-set credentials and enabling multi-factor authentication on accounts as core home protections, which matches the steps above. If you also work from home, your router’s security affects your work devices too. Our guide on strategies for protecting work devices on a home network covers how to keep those devices separate.

Should Smart Devices Be on a Separate Guest Network?

Yes, if the device only needs internet access. CISA says connecting smart home devices to a guest Wi-Fi network keeps them from finding other devices or reaching router settings. That isolation limits what an attacker can reach after compromising a single gadget.

Device type	Recommended network	Why
Smart plugs, bulbs, thermostats	Guest network	Only need internet access to work
Cameras and doorbells	Guest network	Limits access to other devices if compromised
Laptops, phones, work computers	Main network	Hold personal and sensitive data
Network storage (NAS) and printers	Main network, with strong access controls	Often need access from your main devices
Devices that must talk to your phone locally	Test both options	Some casting or local-control features break across networks

How Do You Set Up a Guest Network?

1. Log in to your router’s admin page and find the guest network or guest Wi-Fi section.
2. Turn the guest network on and give it a unique name and a strong passphrase that differs from your main network.
3. Confirm that guest devices are isolated from your main network, if the router has a setting for this (often called client isolation or AP isolation).
4. Connect each smart device to the guest network, one at a time, following the manufacturer’s setup prompts.
5. Test each device’s features. If a device stops working, move it back to the main network and consider whether the convenience is worth the exposure.

Does a VPN Improve Smart Home Security?

A VPN (virtual private network) encrypts traffic between your network and a remote server, but it does not secure your devices by itself. It helps when data travels across networks you don’t control, such as when you access cameras remotely over public Wi-Fi. It does not fix weak passwords, outdated firmware, or an exposed router.

Most smart home devices can’t run a VPN app directly, so the connection is usually configured on the router or on a separate gateway device. Set up the basics in the sections above first, and treat a VPN as an optional extra.

What Should You Look for in a Smart Home VPN?

• A published, independently audited no-logs policy.
• Modern encryption and secure protocols, such as WireGuard or OpenVPN.
• Compatibility with your router or gateway, if you plan to protect the whole network.
• Acceptable connection speeds, since a slow tunnel can cause lag in camera feeds and voice commands.
• Clear support and privacy documentation from the provider.

For a broader look at popular platforms that tie these devices together, see our comparison of voice-controlled smart home systems, which covers how each ecosystem handles accounts and device sharing.

How Do You Monitor Smart Home Devices for Suspicious Activity?

Check each device’s activity log monthly and turn on alerts for new logins and unusual access. Most major manufacturer apps show recent sign-ins, device connections, and camera access history. Unfamiliar entries are an early warning that a password may be compromised.

If you see an unrecognized login, change the account password, sign out all other sessions if the app allows it, and confirm 2FA is active. Then review which devices are still connected to your account and remove any you don’t recognize.

How Do You Reduce Risk by Disabling Features and Retiring Devices?

Disable any feature you don’t use, and remove devices you no longer need from your accounts and network. Every extra camera, microphone, remote-access setting, or connected app is another way in, so cutting them down shrinks your exposure. This step is often overlooked but takes only a few minutes.

• Turn off voice assistants and microphones you don’t use.
• Disable cameras in rooms where you don’t need monitoring.
• Turn off Bluetooth and remote access when you aren’t using them.
• Uninstall apps for devices you no longer own.
• Remove old devices from your router’s connected-device list and from your manufacturer accounts.

Before you sell, donate, or recycle a device, perform a factory reset and remove it from your accounts so the next owner can’t access your data. If the device is no longer usable, responsible disposal keeps personal data and electronics out of landfills; our guide to reducing e-waste at home explains safe options. To get more life from devices that still work, read about extending the life of your devices before replacing them.

How Do You Teach Your Household About Smart Home Security?

Share the basics with everyone who uses the devices, and agree on simple household rules. Most security failures happen through a weak password, a shared login, or a guest who connects an unknown device. Clear, short rules prevent most of these.

• Store shared logins in a password manager rather than in texts or sticky notes.
• Ask before adding a new device or app to the household network.
• Agree on when cameras may be on and where they may point, especially in shared or bedroom areas.
• Report unfamiliar notifications or device behavior to the account owner right away.

Frequently Asked Questions

Is smart home security worth it for a small apartment?

Yes. Even a few connected devices, such as a smart plug, a video doorbell, or a voice assistant, can expose your Wi-Fi network if they are misconfigured. The steps here, including a strong router password, updates, and a guest network, cost little and apply to any size home. Renters can follow the same steps.

Do I need a VPN for smart home devices?

Most households don’t need one to be reasonably secure. A VPN encrypts traffic between your network and a remote server, which helps mainly when you access devices remotely over untrusted networks. Strong passwords, updates, and router settings matter more.

What is WPA3, and should I use it?

WPA3 is the current Wi-Fi security standard that encrypts traffic between your devices and your router. Use it if your router and all your devices support it, since it is harder to attack than older standards. If some devices only support WPA2, use WPA2 with a long, unique passphrase rather than leaving the network open.

How often should I update smart home devices?

Turn on automatic updates wherever they are available, and check manually at least once a month for devices that don’t update on their own. Install security patches as soon as they appear, and check your router’s firmware at the same time. A device that no longer receives updates should be replaced or isolated on a guest network.

What should I do before selling a smart device?

Remove the device from your manufacturer account and your router’s connected-device list, then perform a factory reset. Confirm the reset completed, and change any passwords the device was connected to if you’re unsure. This prevents the next owner from accessing your data or your network.

Conclusion

Smart home security starts with the router and the passwords that protect your accounts, then extends to updates, network isolation, and cleanup. Work through the checklist above once, then repeat the monthly checks on activity logs and firmware. Each step is small, but together they make it much harder for an attacker to reach your devices or your home network.