Skip to Main Content
< BackThursday, July 19, 2018

Avira Home Guard: One out of every four routers is vulnerable to hackers

The new Avira Home Guard, the free security assistant for today’s smarter homes, found that over a quarter of routers had an exposed port, leaving the router and the home network vulnerable to hackers.

Tettnang, Germany, July 19th 2018 – The new Avira Home Guard, the free security assistant for today’s smarter homes, found that over a quarter of routers had an exposed port, leaving the router and the home network vulnerable to hackers. Even worse, these vulnerable routers were highly exposed, with each having an average of more than 6 open ports.

Open router ports are just one of the security issues in today’s smart homes. While IoT devices have many features, these new devices bring an array of built-in and owner-enabled security and privacy issues.

“Having a smart home is great, as things are faster, better, and cheaper to use. But to ensure that people can take advantage of these new technologies, we also want to make sure that their homes are safe and secure,” said Travis Witteveen, Avira CEO. “This need for a basic security scan that gives people an overview of what’s in their networks is why we developed Avira Home Guard.”

Avira conducted a two-month worldwide scan* of over 845,000 smart devices with a beta variant of Home Guard—a free app from Avira for both Android and Windows devices—mapping out connected devices in home networks, checking for any unpatched vulnerabilities, and recommending ways that users can fix them.

Over a quarter of the 137,000 identified routers (26.2%) had open ports, leaving them vulnerable to hackers. Even worse, there were often multiple open ports per router, indicating that if a home network was insecure, it was likely to be very insecure. The most common issue was with open FTP ports (150,000), the standard network protocol for transferring computer files.

The global project showed an average of 6 connected devices in each household, an indicator that smart home networks are getting bigger. Traditional devices—computers (31%) and smartphones and tablets (20.8%)—are on the verge of becoming a minority among the growth of other smart devices such as TVs and exercise trackers.

“The results show people need to take a closer look at the security of their smart homes and make some changes, especially on their routers, to enhance it. Open external ports allow about anyone to contact and exchange information with the online device,” said Vikas Seth, Avira Connect director. “We’ve designed Avira Home Guard to help detect vulnerabilities and offer suggestions on how a person can improve the security of their smart homes.”

Take a free smart home test with Avira Home Guard

1. Scan your home network: Avira Home Guard automatically discovers the connected network, then goes to work identifying everything on it. This list includes smart devices, Wi-Fi routers, cameras, smart TVs, Wi-Fi printers, media servers, as well as other computers, tablets, and smartphones in the house.

2. Uncover vulnerabilities and get recommended solutions: Avira Home Guard scans the router for known vulnerabilities such as open ports. Once identified, Home Guard informs and advises the user to close the unwanted ports on router.

3. Remember all online devices: Home Guard remembers all the devices that have been connected to the network in the past (from the owner’s devices to visitors' devices), in addition to automatically looking for new devices. This memory enables it to more accurately chart all devices connected on the network and the security issues that they could raise.

Availability and price

Avira Home Guard is a completely free solution from Avira for Windows and Android devices. It can be downloaded via and at the Google Play Store.

Avira global research findings (April 1st – May 31st, 2018)

Average number of connected devices per network:

6 (rounded)

Total number of connected devices scanned:




Smartphones & tablets:








Home automation (i.e. cameras):




Total number of scanned routers:


Routers with open ports


Open ports by type:







*Home Guard user database scan

Important: Your current Windows version is outdated and no longer supported.
For your security, we recommend switching to Windows 10 before downloading Avira software.
Update your Windows version here.
Wichtig: Ihre Windows-Version ist veraltet und wird nicht mehr unterstützt.
Zu Ihrer Sicherheit empfehlen wir Ihnen den Wechsel zu Windows 10 vor dem Download unserer Software.
Hier können Sie Ihr Windows aktualisieren.
Important: Votre version actuelle de Windows est obsolète et n’est plus prise en charge.
Pour votre sécurité, nous vous conseillons de passer à Windows 10 avant de télécharger le logiciel Avira.
Mettez à jour votre version de Windows ici.
Importante: Tu versión actual de Windows está desactualizada y ya no es compatible.
Por tu seguridad, te recomendamos que instales Windows 10 antes de descargar la solución de Avira.
Actualiza aquí tu versión de Windows.
Importante: La tua attuale versione di Windows è obsoleta e non è più supportata.
Per la tua sicurezza, ti consigliamo di passare a Windows 10 prima di scaricare i software Avira.
Aggiorna la tua versione di Windows qui.
Importante: Sua versão atual do Windows está desatualizada e não tem mais suporte.
Para sua segurança, recomendamos que troque para o Windows 10 antes de baixar o software da Avira.
Atualize sua versão do Windows aqui.
Важно: ваша версия Windows устарела и больше не поддерживается.
Из соображений безопасности перед загрузкой ПО Avira мы рекомендуем перейти на Windows 10.
Обновить Windows вы можете здесь.
Belangrijk: Uw huidige versie van Windows is verouderd en wordt niet meer ondersteund.
Voor uw veiligheid adviseren wij u om over te stappen op Windows 10 voordat u de Avira-software downloadt.
Update uw Windows-versie hier.
Önemli: Kullanmakta olduğunuz Windows sürümü eski ve artık desteklenmiyor.
Güvenliğiniz için Avira yazılımını indirmeden önce Windows 10 sürümüne yükseltmenizi öneririz.
Windows sürümünü buradan güncelleyin.
重要 : 現在お使いの Windows バージョンは古いため、サポートされなくなりました。
安全のため、Avira ソフトウェアをダウンロードする前に Windows 10 に切り替えることをお勧めします。
こちらより Windows バージョンをアップデートしてください
重要信息 : 您当前的 Windows 版本已过时,并且不再受支持。
为了安全起见,我们建议您在下载 Avira 软件之前切换到 Windows 10。
在此升级您的 Windows 版本
重要資訊 : 您當前的 Windows 版本已過時,並且不再受支援。
為了安全起見,我們建議您在下載 Avira 軟體之前切換到 Windows 10。
在此升級您的 Windows 版本