Smart Home Security Audit: What to Check Before You Feel Protected

Technology Editorial Team Staff Writer · Oct 26, 2023 · 5 min read

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Use this checklist to review your router settings, device passwords, firmware versions, and network segmentation for a more secure connected home.

Key Takeaways

Default router and device passwords are one of the most common and avoidable security weaknesses in connected homes.
Keeping firmware updated closes known vulnerabilities that attackers actively exploit.
Isolating smart devices on a separate network limits damage if any one device is compromised.
Two-factor authentication adds a critical layer of protection for smart home app accounts.
Regularly reviewing connected devices helps you spot unauthorized or forgotten hardware.

Why a Security Audit Matters Before You Feel Protected

Adding smart devices to your home — thermostats, cameras, locks, speakers — creates real convenience. It also expands the number of entry points on your home network. Feeling protected and actually being protected are two different things. Many households run connected devices with factory settings, outdated software, and no network segmentation, creating vulnerabilities that are straightforward for attackers to exploit.

This checklist walks through the core areas every smart home owner should review: your router configuration, device credentials, firmware status, account security, and network structure. You don't need to be a network engineer to work through it — you need about 30 to 60 minutes and access to your router's admin panel and device apps.

For a deeper look at what data your devices are collecting along the way, see the privacy trade-offs of always-on smart home devices.

Required

Router Admin Panel

Access your router's settings to check firmware, encryption type, remote access, and connected devices.

Required

Password Manager

Generate and securely store unique, strong passwords for your router and each smart device account.

Required

Smart Device Companion Apps

Check firmware versions and security settings for each connected device from its manufacturer's app.

Optional

Authenticator App

Enable two-factor authentication on smart home accounts without relying solely on SMS codes.

How to Use This Checklist

Work through each group in order. Items marked must are non-negotiable foundations — skip them and the rest of your effort provides little protection. Items marked should are strongly recommended for most households. Nice-to-have items add meaningful depth if you have the time and capability.

If you discover your smart devices are currently sharing a network with computers and phones, consider reading our guide on setting up a guest network for smart home devices — network segmentation is one of the most effective steps you can take.

Default Passwords Are a Known Attack Vector

Many smart home devices ship with identical factory passwords documented publicly online. Attackers routinely scan networks for devices still using these defaults. Changing every default credential — both on your router and on individual devices — is the single most impactful step in this entire audit. Do this before moving to any other item on the list.

Router Configuration

Change the router's default admin username and password to a strong, unique credential you store in a password manager. Must

Rename your Wi-Fi network (SSID) to something that does not reveal your router brand or your household identity. Must

Confirm your router is using WPA3 encryption; if only WPA2 is available, verify it is enabled rather than an older standard like WEP. Must

Disable remote management features on your router unless you have a specific, verified need for them. Should

Check whether Universal Plug and Play (UPnP) is enabled and disable it if you do not actively require it — it can open ports automatically without your knowledge. Should

Firmware and Software Updates

Log into your router's admin panel and check for a firmware update; apply any available update immediately. Must

Open the companion app for each smart device and verify it is running the latest firmware version. Must

Enable automatic firmware updates on any device or app that supports it, so future patches apply without manual effort. Should

Make a note of any device that no longer receives manufacturer updates — older hardware with no patch support represents an elevated, ongoing risk. Should

Device Passwords and Accounts

Replace factory-default passwords on every smart device with unique, strong passwords — never reuse the same password across devices. Must

Enable two-factor authentication (2FA) on every smart home app account that supports it. Must

Review which third-party apps and services have been granted access to your smart home accounts and revoke any that are unused or unrecognized. Should

Use a dedicated email address for smart home accounts to contain the impact if one account is involved in a data breach. Nice to have

Network Segmentation and Device Inventory

Generate a list of every device currently connected to your home network and confirm you recognize each one. Must

Move smart home devices onto a separate network (often called a guest network or IoT VLAN) away from computers, phones, and tablets. Should

Disable any smart device features you do not actively use — such as remote access, voice control, or location tracking — to reduce your exposure. Should

Label devices in your router's connected-device list so future audits are faster and easier to cross-reference. Nice to have

Consider enabling network-level DNS filtering (available on some routers and as a separate service) to block known malicious domains at the network level. Nice to have

After the Audit: Keeping Your Setup Secure Over Time

A one-time audit is a starting point, not a finish line. Firmware updates release on irregular schedules, new devices get added to your network, and app account passwords can be compromised in unrelated data breaches. Set a calendar reminder to repeat the core checks — particularly firmware review and connected device inventory — every three to six months.

If you are building out your setup and want to make smart purchasing decisions from the start, building a smart home without locking yourself into one ecosystem covers how to choose devices that give you flexibility and ongoing support. Your router configuration is also worth revisiting anytime you switch internet plans — see the home network readiness checklist for guidance on that transition.

Security is not a feature you purchase once — it is a habit of regular review. The steps above give you the framework to make that habit manageable.

Technology Editorial Team

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