I set up my first smart camera three years ago and had it exposed on the open internet within a week, because I skipped the router settings and left the default login in place. That mistake taught me most smart home hacks are not sophisticated at all. They happen because basic setup steps get skipped.
To secure smart home devices from hackers, change every default password, put devices on a separate guest network, turn on two factor authentication, and keep firmware updated. These four habits close most of the openings attackers rely on. Most smart home breaches trace back to reused passwords or unpatched firmware, not advanced hacking skills.
How to Secure Smart Home Devices From Hackers
Secure your smart home by changing default passwords, using a dedicated guest network for IoT devices, enabling two factor authentication where available, and installing firmware updates as soon as they release. These steps block the majority of real world smart home attacks.
Key Takeaways
- Change default usernames and passwords on every device and on your router.
- Put smart devices on a separate guest or IoT network, away from computers and phones.
- Turn on two factor authentication for any device or app that supports it.
- Install firmware and app updates as soon as they become available.
- Watch for unusual device behavior, since it often signals a compromise.
Why You Need to Secure Smart Home Devices From Hackers
Most smart home devices ship with weak default settings because manufacturers prioritize easy setup over security. A camera or plug that works out of the box in two minutes usually skipped several security steps to get there.
Attackers know this pattern well. They run automated scans across the internet looking for devices still using factory passwords or open ports.
According to CISA, internet connected devices are often configured with default passwords that are easily found online, which removes the barrier those passwords were meant to provide.
Convenience features add to the problem. Remote access, voice control, and app pairing all require open communication with outside servers.
Every one of those connections is a potential doorway. The more features a device offers, the more doorways exist for something to go wrong.
How Smart Home Hacks Actually Happen
The 2016 Mirai attack remains the clearest real world example of what happens when smart devices go unsecured. Malware scanned the internet for cameras and routers still using factory passwords.
According to CISA, the Mirai malware continuously scanned for vulnerable devices and used the ones it found to launch some of the largest denial of service attacks on record. Home cameras and routers made up a large share of the compromised devices.
None of those owners noticed anything wrong at first. Their cameras still worked normally while quietly taking part in attacks on other websites.
That pattern still holds today. Most home hacks are not targeted attacks by a determined individual, they are automated scans that catch whichever device happens to be unprotected.
This matters because it changes how you should think about defense. You are not trying to outsmart a specific attacker, you are trying to avoid being the easiest target on a list of thousands.
Learning how to secure smart home devices from hackers now takes far less effort than recovering from a breach later.
How to Secure Smart Home Devices From Hackers in 8 Steps
Follow these steps in order for the biggest security gain with the least effort. Each one closes a specific opening that hackers commonly use against home networks.
- Change the default password on your router and every connected device immediately after setup.
- Create a separate guest or IoT network so smart devices cannot reach your computers or phones.
- Turn on WPA3 encryption on your router, or WPA2 if WPA3 is not available.
- Enable two factor authentication on every device app that offers it.
- Turn on automatic firmware updates for your router and all smart devices.
- Disable remote management and UPnP on your router unless you specifically need them.
- Review each device’s app permissions and turn off microphones or cameras you do not use.
- Retire devices that no longer receive security updates from the manufacturer.
Secure Your Home Wi-Fi Network First
Your router is the front door to every smart device in your house, so it needs attention before anything else. A weak router password puts your entire smart home at risk, not just one device.
Change the router’s default admin username and password to something long and unique. Also rename your Wi-Fi network so it does not reveal your address or name.
CISA recommends disabling Universal Plug and Play on home routers, since threat actors can use it to spread malware to connected devices and control them remotely.
Use Strong Passwords and Two Factor Authentication
Weak or reused passwords remain the single biggest reason smart home devices get compromised. A password used on one device and reused elsewhere gives an attacker access to everything at once.
Use a unique password for each smart device account, ideally generated and stored in a password manager. This removes the need to memorize dozens of separate logins.
Two factor authentication adds a second check beyond the password itself. Even if a password leaks, the attacker still needs your phone or authenticator code to get in.
Keep Firmware and Apps Updated
Outdated firmware is one of the most common paths hackers use to break into smart devices. Manufacturers regularly patch security flaws, but those patches only help if you actually install them.
Turn on automatic updates wherever the option exists, so patches install without you needing to remember. For devices without auto updates, check the manufacturer’s app or website every few months.
A device running years old firmware carries every vulnerability discovered since its last patch. That risk grows the longer an update gets delayed.
Separate Smart Devices on a Guest Network
Putting smart devices on their own network limits what an attacker can reach if one device gets compromised. This single step is one of the most effective defenses available to regular homeowners.
Most modern routers support a guest or secondary network option in their settings app. Move cameras, plugs, speakers, and other IoT gadgets onto that network, and keep computers and phones on your main one.
If a smart plug gets breached on an isolated network, the attacker still cannot reach your laptop or stored files. That containment is the entire point of segmentation.
How to Secure Smart Home Devices From Hackers Before You Buy
Security starts before a device even reaches your home. Some manufacturers take security seriously, while others treat it as an afterthought.
Look for a published support timeline on the manufacturer’s website before buying. A company that states how many years it will provide updates is signaling a real security commitment.
Check whether the device requires a mandatory password change during setup. Devices that force this step from the start remove one of the most common vulnerabilities immediately.
Search for the manufacturer’s name alongside recent security news before purchasing. A pattern of unresolved vulnerabilities or slow patch releases is a warning sign worth taking seriously.
Avoid devices that only work through cloud servers with no option for local control. Local control means the device can still function, and stay more contained, even during an internet outage or account breach.
More Ways to Secure Smart Home Devices From Hackers
The steps above cover the essentials, but a few additional habits add meaningful protection for households with many connected devices. These are worth adopting once the basics are in place.
Set up your router’s built in firewall if it is not already active. Most modern routers include this feature under the security or advanced settings menu.
Consider a DNS filtering service that blocks known malicious domains at the network level. This stops many devices from communicating with attacker controlled servers even if a device gets compromised.
Review your router’s connected device list once a month as a habit. Catching an unfamiliar device early limits how much damage it can cause.
Disable features you never use, such as remote access on a camera you only view at home. Every disabled feature removes one more way in for an attacker.
Quick Security Checklist by Device Type
| Device Type | Biggest Risk | Fastest Fix |
| Smart cameras | Live feed accessed remotely | Change default password, enable two factor authentication |
| Smart speakers | Voice recordings exposed | Review and delete stored recordings regularly |
| Smart locks | Unauthorized unlocking | Use a strong unique code, enable app alerts |
| Smart TVs | Data collection and tracking | Turn off ad tracking and unused microphones |
| Smart thermostats | Remote setting changes | Update firmware, restrict app permissions |
| Smart plugs and outlets | Device hijacked for botnet use | Change default password, place on guest network |
| Smart doorbells | Footage accessed without consent | Enable two factor authentication, review shared access list |
Signs Your Smart Home Device May Already Be Hacked
Devices behaving on their own is one of the clearest warning signs of a breach. Lights turning on unexpectedly or a camera repositioning itself are not normal glitches.
Unusually high data usage from a single device can also point to a problem. Compromised devices often send data to outside servers in the background.
Check your router’s connected device list for anything unfamiliar. An unknown device name on your network is worth investigating right away.
FAQs
How can a smart home device be hacked?
Most smart home devices get hacked through default passwords, outdated firmware, or open network ports. Attackers use automated tools to scan for these weaknesses across the internet rather than targeting individual homes.
Are smart home devices safe to use in 2026?
Smart home devices can be safe when set up correctly with strong passwords, updated firmware, and network segmentation. The technology itself is not inherently unsafe, but default settings often leave gaps that need to be closed manually.
Should I put smart home devices on a guest network?
Yes, placing smart devices on a separate guest or IoT network is one of the most effective ways to limit damage from a breach. It keeps compromised devices from reaching computers, phones, and stored files.
Do smart home devices need antivirus software?
Most smart home devices cannot run traditional antivirus software directly. Instead, protection comes from router level security, network segmentation, and keeping device firmware current.
How do I know if my smart home device has been hacked?
Watch for devices operating on their own, unusual data usage, or unfamiliar devices appearing on your network list. Checking your router’s connected device log regularly helps catch problems early.
What is the most important step to secure IoT devices?
Changing default passwords is widely considered the single most important step, since factory credentials are often published online. Combining that with network segmentation covers the two biggest attack paths.
How often should I check my smart home devices for security issues?
Reviewing your router’s connected device list and installing available updates once a month is a reasonable routine. Devices that handle cameras or locks are worth checking more often, since they carry higher privacy risk.
Does a VPN help secure smart home devices?
A VPN on your router can add a layer of protection by encrypting traffic leaving your home network. It does not replace basic steps like strong passwords, updated firmware, and network segmentation, which matter more for most households.
I still keep every smart device on its own network, years after that first camera mistake, and it has not caused a single security scare since. Once you know how to secure smart home devices from hackers, the whole setup takes an afternoon and keeps working quietly in the background. The Cybersecurity and Infrastructure Security Agency’s guide on securing the Internet of Things is a solid place to check your router settings against.
For general background on how these devices work, see Wikipedia’s overview of the Internet of Things. For official federal guidance on IoT device security, see CISA’s Securing the Internet of Things.
Read More: What Risk Is Posed by Internet of Things Devices?
