IoT security risks are no longer only a business problem. Smart cameras, routers, TVs, speakers, thermostats, projectors, picture frames, and other connected devices can become a quiet entry point into a home network when they ship with weak settings, stop receiving updates, use risky cloud accounts, or install apps from unofficial stores.
The practical question is not whether every smart device is dangerous. It is whether a device on your network can be updated, identified, isolated, and removed if it starts behaving strangely. In 2025, the FBI warned that BADBOX 2.0 was abusing home internet-connected devices for botnet and residential-proxy activity, and Google said the campaign had compromised more than 10 million uncertified Android-based devices. That is the modern IoT risk: a device can look normal on the shelf while someone else uses your connection.
Check these first if you are worried about IoT security:
- Unknown devices in the router client list, especially generic cameras, TVs, projectors, or Android boxes.
- Unexplained upload traffic when nobody is streaming, gaming, backing up, or updating devices.
- A smart TV or streaming box that asks you to disable Play Protect or install from an unofficial marketplace.
- Camera, microphone, or doorbell activity that appears when nobody is using the app.
- Old firmware, default admin passwords, abandoned vendor apps, or cloud accounts without multi-factor authentication.
What IoT Means for Home Security
The Internet of Things means ordinary objects now connect to the internet and exchange data: routers, IP cameras, smart locks, thermostats, TVs, baby monitors, printers, lighting hubs, watches, appliances, and sensors. The useful part is convenience. The security problem is that each device becomes another computer with firmware, credentials, network access, and a cloud service behind it.
A laptop or phone usually receives visible security updates and runs endpoint protection. Many IoT devices do not. Some have limited update support, weak default settings, exposed admin panels, hard-to-review apps, or no clear end-of-life notice. If that device sits on the same network as Windows PCs, phones, NAS storage, work laptops, or security cameras, a compromise can become more than a gadget problem.
Why People Actually Search for IoT Security Help
Most victims do not start with a broad search like “Internet of Things impact.” They search after a symptom: “unknown device on my router,” “smart camera hacked,” “smart TV malware,” “router DNS changed,” “IP address blacklisted,” “why is my internet uploading,” or “how to secure IoT devices.” That is why practical pages rank better than abstract IoT explainers.
Use the symptom as the starting point. If your router list changed, check the router first. If a camera moved or lit up unexpectedly, check the camera account and viewing history. If a TV box requested unofficial apps, disconnect that device before troubleshooting the PC. If an antivirus warning appears on a Windows computer after suspicious network activity, scan the computer too, because browser hijackers, proxyware, and malware can create similar traffic.
The Main IoT Security Risks
1. Default or reused passwords
Default admin passwords, reused cloud-account passwords, and shared family logins are still common failure points. If one camera, TV, or router account reuses a leaked password, attackers may not need a technical exploit at all. Change device admin passwords, Wi-Fi passwords, and vendor account passwords to unique values.
2. Old firmware and abandoned devices
Routers, cameras, printers, and TV boxes can remain online for years after the vendor stops fixing vulnerabilities. If the device has no update page, no recent firmware, and no clear vendor support policy, move it to a guest network or replace it. A cheap device can become expensive if it exposes your whole home network.
3. Unofficial apps and uncertified streaming boxes
BADBOX 2.0 is the clearest recent warning here. The FBI described compromised home IoT products, including streaming devices and projectors, that could be abused through preinstalled malicious software or malicious setup apps. Be especially cautious with “unlocked” streaming boxes, unfamiliar brands, unofficial marketplaces, and setup instructions that ask you to disable security protections.
4. Botnets and residential proxy abuse
A compromised IoT device may not steal files from your laptop directly. Instead, it may join a botnet, relay traffic, commit ad fraud, scan other targets, or sell access to your home IP as a proxy. The visible symptom may be weak: slower internet, strange router traffic, CAPTCHA spikes, account blocks, or IP reputation warnings. For deeper signs, compare this with our botnet infection checklist.
5. Cameras, microphones, and privacy exposure
Smart cameras, baby monitors, doorbells, speakers, and TVs collect sensitive data by design. The risk is not only a hacker “watching live.” It can also be weak cloud account security, shared device access, old recordings, insecure integrations, or a compromised phone that controls the camera app.
6. Lateral movement inside the network
An IoT device on the same network as your PCs and storage can become a foothold. Good home routers can reduce this risk with a guest network, IoT network, VLAN, or device isolation. Even without advanced networking, putting smart devices on a separate guest Wi-Fi is often better than mixing them with work laptops and file shares.
How to Secure IoT Devices at Home
- Inventory your devices. Open the router app or admin page and list every connected device. Rename known devices so unknown entries stand out later.
- Change default admin credentials. Do this for the router, cameras, NAS, printers, smart hubs, and any device with a web admin panel.
- Update firmware and apps. Check the vendor app and website. Enable automatic updates when the device supports them.
- Use WPA3 or WPA2 encryption. Avoid open Wi-Fi, WEP, and old router settings. The FTC recommends using WPA3 Personal or WPA2 Personal for home Wi-Fi where available.
- Separate smart devices from personal devices. Use a guest network or IoT network for cameras, TVs, speakers, bulbs, and unknown-brand devices.
- Disable risky exposure. Turn off remote admin, UPnP, unnecessary port forwarding, unused integrations, and device features you do not use.
- Secure cloud accounts. Use unique passwords and multi-factor authentication for camera, doorbell, router, and smart-home vendor accounts.
- Remove devices you cannot update. If a vendor app is abandoned or the device has not received security updates in years, retire it or isolate it tightly.
- Scan computers after suspicious traffic. A Windows PC, browser extension, or proxyware app can create IoT-like symptoms. Gridinsoft Anti-Malware can help check a Windows device for malware, proxyware, adware, and suspicious startup entries.
What to Do If You Think a Smart Device Was Hacked
- Disconnect the device. Unplug Ethernet or remove it from Wi-Fi before changing settings.
- Check the router. Look for unknown devices, DNS changes, port forwards, remote admin exposure, and unusual traffic.
- Change passwords from a clean device. Update the vendor account, email account, router admin password, and Wi-Fi password if exposure is plausible.
- Update or factory reset the device. Install current firmware first. If you reset it, set it up with a new password and avoid restoring suspicious settings.
- Review account access. Remove unknown shared users, old phones, third-party integrations, and unused automations.
- Scan Windows devices on the same network. If browser redirects, fake alerts, unknown extensions, or repeated security warnings appear, use the Gridinsoft Anti-Malware scanner and check suspicious links with the Gridinsoft URL Scanner.
Which Smart Devices Deserve the Most Attention?
| Device type | Why it matters |
|---|---|
| Router or mesh Wi-Fi | It controls network access, DNS, Wi-Fi encryption, port forwarding, and device isolation. |
| Security camera or baby monitor | It can expose private audio/video and often depends on a cloud account. |
| Smart TV or streaming box | It may run apps, request broad permissions, and stay online for long periods. |
| NAS, printer, or home server | It may store files or expose admin panels that attackers can target from inside the network. |
| Unknown-brand smart plugs, bulbs, and hubs | They are easy to forget, may receive fewer updates, and can still create outbound traffic. |
When IoT Is Not the Real Problem
Do not blame every slow connection on smart devices. Cloud backups, Windows updates, game downloads, streaming, browser extensions, VPNs, and malware on a normal computer can all create suspicious traffic. If the symptom is mostly browser pop-ups, redirects, fake antivirus pages, or repeated security-tool alerts, start with the computer and browser. If the symptom is unknown router devices, camera behavior, uncertified streaming hardware, or router DNS changes, treat IoT as part of the incident.
For network-level risks, our ARP spoofing guide explains how local attackers can intercept traffic on a LAN. For IoT malware trends, see IoT malware attack growth and the GorillaBot Mirai-variant analysis.
FAQ
Can smart home devices really be hacked?
Yes. The most common risks are weak passwords, outdated firmware, exposed admin pages, compromised cloud accounts, unofficial apps, and cheap devices with poor security support.
How do I know if an IoT device is compromised?
Look for unknown devices on the router, unexplained upload traffic, changed DNS or port-forwarding settings, unexpected camera activity, unfamiliar shared users, and devices that require unofficial apps or disabled security protections.
Should IoT devices be on a guest network?
Yes, when your router supports it. A separate guest or IoT network limits what smart devices can reach if one of them is compromised.
Is a factory reset enough?
It can help, but only if you also update firmware, set a new password, remove unknown cloud-account access, and avoid reinstalling the same risky app or configuration.
Can antivirus protect a smart TV or camera?
Usually not directly. Antivirus is most useful on Windows, macOS, Android, and other supported endpoints. For IoT devices, focus on firmware updates, strong accounts, network isolation, and removing unsupported hardware.
References
- Federal Bureau of Investigation Internet Crime Complaint Center. “Home Internet Connected Devices Facilitate Criminal Activity.” IC3 Public Service Announcement I-060525-PSA, June 5, 2025. https://www.ic3.gov/PSA/2025/PSA250605
- Google. “Google takes legal action against Badbox 2.0 cyberattack.” The Keyword, accessed June 7, 2026. https://blog.google/technology/safety-security/google-taking-legal-action-against-the-badbox-20-botnet/
- Federal Trade Commission. “Securing Your Internet-Connected Devices at Home.” Consumer Advice, accessed June 7, 2026. https://consumer.ftc.gov/articles/securing-your-internet-connected-devices-home
