Key Takeaways
Why Setup Is Just the Beginning
Getting a smart speaker, connected thermostat, or home security camera working feels like the finish line — but from a security standpoint, it's closer to the starting line. Home devices are frequently targeted precisely because many households treat initial setup as the only security step they'll ever need.
The habits covered here don't require technical expertise. They're practical, repeatable, and address the most common ways connected home devices are compromised. If you've been thinking about how your devices fit into a broader home automation setup, our full overview of smart home automation covers the broader picture.
Enable automatic firmware updates on every connected device you own.
Firmware updates frequently include patches for security vulnerabilities discovered after a product ships. Devices running outdated firmware are known targets for automated scanning tools that probe home networks continuously. Enabling automatic updates removes the reliance on remembering to check manually.
Replace all default usernames and passwords immediately after setup.
Default credentials for popular routers and smart devices are publicly documented in manufacturer manuals and widely circulated in security research. Leaving them unchanged essentially leaves the front door unlocked. A strong, unique password for each device's admin interface is one of the most effective individual steps available.
Place smart home devices on a dedicated guest or IoT network segment.
Network segmentation limits the blast radius of any single compromise. If a smart bulb or plug is exploited, an attacker on a segmented network cannot easily reach devices on the main network, such as laptops containing sensitive files or accounts.
Disable device features and remote access ports you don't actively use.
Every enabled feature is a potential entry point. Remote access capabilities, UPnP (Universal Plug and Play), and Telnet are commonly enabled by default but rarely needed by typical home users. Disabling unused features — sometimes called reducing your attack surface — limits the number of ways an attacker can interact with a device.
Audit your connected devices periodically and remove anything you no longer use.
Devices that are powered on but forgotten — old smart plugs, a decommissioned camera, a previous generation hub — still receive network traffic and may no longer receive firmware updates from their manufacturer. Unpatched, forgotten devices are attractive targets.
The Core Security Practices
Each of the following practices addresses a specific and well-documented risk. Taken together, they form a meaningful defence-in-depth approach for everyday home users.
Your Network: The Foundation Everything Depends On
Every connected device in your home communicates through your router, making your network the single most important security layer. A compromised router can expose every device on it — cameras, locks, laptops, and phones alike.
What 'Default Credentials' Actually Means
Every router and many smart devices ship with a preset username and password — often something like 'admin' / 'admin' or 'admin' / 'password.' These are identical across thousands of units of the same model and are documented in publicly available manuals. Attackers use automated tools that cycle through these known defaults to gain access. Changing them is not just good practice — it's the baseline security step the device manufacturer expects you to take.
Many routers have a built-in guest network feature, which creates an isolated segment separate from your main network. Placing smart home devices — bulbs, plugs, thermostats, cameras — on that guest network means that if one is compromised, the attacker has a much harder time pivoting to your computer or phone. This concept, often called network segmentation, is standard practice in enterprise security and applies equally at home.
For broader device security habits that translate across all your technology, the same principles discussed in keeping your phone secure — strong passwords, limiting unnecessary permissions, and staying updated — apply directly to home devices too.
57%
IoT devices vulnerable to medium- or high-severity attacks
According to Palo Alto Networks' 2020 IoT Threat Report, 57% of IoT devices they observed were vulnerable to medium- or high-severity attacks, with weak passwords among the leading contributing factors.
98%
IoT device traffic that is unencrypted
The same Palo Alto Networks report found that approximately 98% of IoT device traffic was transmitted without encryption, underscoring the importance of network-level protections like segmentation.
Ongoing Habits That Make a Real Difference
Security isn't a one-time event. Threats evolve, manufacturers patch newly discovered vulnerabilities, and your device inventory changes over time. Scheduling a brief quarterly review — checking which devices are active, confirming firmware is current, and reviewing which apps have access — keeps your posture current without consuming significant time.
If you're a renter with smart home devices, it's worth noting that some security configurations (like router changes) may intersect with your lease terms. The guide to renting and smart home tech addresses what tenants can realistically control.
Use a Password Manager for Device Credentials
Tracking unique passwords for a router admin panel, a camera app, a smart lock, and several other devices quickly becomes unmanageable. A password manager stores and auto-fills strong, unique credentials for each account, removing the temptation to reuse the same password everywhere. Many are free for personal use and work across phones, tablets, and computers.
Finally, interoperability issues — apps shutting down, protocols changing — can occasionally force device re-pairing or factory resets that inadvertently restore default (weak) credentials. If you've ever had to reset a device due to compatibility problems, re-check its security settings afterward. Our article on why smart home devices stop working together explains why this happens and what to watch for.