Smart Home Privacy Risks: What’s Actually Hiding in Your Connected Devices

Smart Home Privacy Risks Go Far Beyond What You’d Expect

Smart speakers, video doorbells, connected thermostats — they’re genuinely useful. They’re also, by design, always collecting something: your voice, your routines, your face on camera, sometimes your location. That’s not a conspiracy theory, it’s the business model.

The real question isn’t whether your smart home collects data — it’s whether you know what happens to it after that, and whether the device is actually secured against someone who isn’t you.

The scale here is hard to overstate. There are roughly 19.8 billion connected IoT devices worldwide as of 2025 [1], though estimates from other research firms run as high as 40+ billion depending on what counts as a “device.” The global smart home market alone was valued at around $155 billion in 2023 [2].

Real Smart Home Security Vulnerabilities, By Device

This part isn’t hypothetical. Security researchers at Bitdefender identified multiple vulnerabilities in EZVIZ smart cameras in 2022, including a buffer overflow bug (CVE-2022-2471) that could allow remote code execution, and a password-recovery flaw (CVE-2022-2472) — together affecting an estimated 10 million devices [3].

Academic researchers from the University of Catania and University of London found four vulnerabilities in TP-Link’s Tapo L530E smart bulb and its companion app in 2023, the worst of which (CVSS score 8.8) could let a nearby attacker extract a home’s Wi-Fi password [4].

…most real-world compromises come from the basics — default passwords, unpatched firmware, devices sitting on the same network as everything else…

Google’s Nest camera line has had its own documented issues: Cisco Talos disclosed two high-severity vulnerabilities in the Nest Cam IQ Indoor in 2019 (CVE-2019-5035, CVSS 9.0, and CVE-2019-5040, CVSS 8.5) [5], and a separate researcher publicly disclosed unpatched Bluetooth vulnerabilities in the original Nest Cam and Dropcam Pro models in 2017 after Google failed to ship a fix for months [6].

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Amazon’s Ring has had the most consequential incident of the group.

In May 2023, the FTC filed a complaint alleging that Ring let employees and contractors access customers’ private camera footage — in one case, an employee viewed thousands of recordings from female users’ cameras, including footage from bedrooms and bathrooms, over several months before being caught [7].

The FTC also alleged Ring failed to stop credential-stuffing attacks that compromised more than 55,000 U.S. accounts between January 2019 and March 2020 [8]. Ring settled for $5.8 million and agreed to a 20-year data security program [8]; the FTC began distributing more than $5.6 million of that as consumer refunds in April 2024 [9].

The bigger structural problem is that a lot of IoT devices — smart bulbs, budget cameras, cheap hubs — ship with weak default security, and manufacturers don’t always push updates the way your phone or laptop does. CISA has published specific guidance on this pattern, including default-credential risks and the case for “secure by design” manufacturing [10].

Security researchers have called this category the “internet of threats” for a reason: the 2016 Mirai botnet, one of the most damaging IoT security incidents on record, worked by scanning the internet for devices still running factory-default usernames and passwords and conscripting them into a network used to launch some of the largest denial-of-service attacks ever recorded.

That vulnerability hasn’t gone away. IoT malware volume rose 37% year-over-year in the first half of 2023, according to SonicWall’s threat research team [11]. A 2025 IBM analysis of consumer routers found that 86% of default passwords are never changed [12].

Practically, that means the weak link in your home network might not be your laptop — it might be the smart bulb you bought two years ago and never updated, still sitting on its factory password.

How Smart Home Devices Actually Collect Your Data

Voice assistants like Alexa and Google Assistant listen locally for a wake word, and typically only send audio to the cloud once that word is detected. Cameras capture footage. Thermostats learn your schedule. None of this is secret — it’s disclosed in the privacy policies — but most people don’t read those, and the policies themselves are often vague about exactly how long data is retained or who besides the manufacturer can access it.

Ring’s own FTC case is a useful illustration: the problem wasn’t that the company collected video, it was that far more people inside the company could access it than customers were ever told [7].

The honest version of the trade-off is this: the more a device learns about your routines, the better it works, and the more attractive a target it becomes if something goes wrong.

The Laws Trying to Catch Up

The EU’s GDPR and California’s CCPA are the two frameworks most likely to actually affect what a smart home company can do with your data. Under GDPR Article 33, companies must notify their supervisory authority within 72 hours of becoming aware of a personal data breach, and must obtain informed consent before processing personal data in the first place [13].

CCPA gives California residents a specific set of rights: the right to know what’s being collected about them, the right to request deletion, and the right to opt out of having their data sold to third parties [14].

If you live outside California or the EU, your legal protections are thinner. Most U.S. states have some form of breach notification law, but a comprehensive privacy law like CCPA isn’t universal — what a smart home company owes you can genuinely depend on your zip code.

How to Protect Your Smart Home Privacy

You don’t need to unplug everything. A few things make a real difference. Put your smart home devices on their own Wi-Fi network, separate from your computers and phones, so a compromised smart bulb can’t be used to reach your laptop. Change default passwords — obvious advice, but given that 86% of people never do it [12], clearly not obvious enough, and it’s one of the most common reasons these devices get compromised in the first place.

Two Factor Authorization is a Must

Turn on two-factor authentication anywhere it’s offered, especially for camera and doorbell apps tied to your home’s video feed — Ring made 2FA mandatory in 2020 specifically because of the account-takeover pattern the FTC later cited [8]. And actually install firmware updates when they’re available, since that’s how known vulnerabilities like the ones in EZVIZ, Nest, and Tapo devices get patched.

None of this makes a smart home immune to problems. But most real-world compromises come from the basics — default passwords, unpatched firmware, devices sitting on the same network as everything else — not some sophisticated attack you couldn’t have prevented.

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