How Hackers Could Take Over 11,000 Robot Lawn Mowers—and What It Means for Smart Home Security

A German security researcher named Andreas Makris has uncovered serious security flaws in Yarbo robot lawn mowers that could allow hackers to take remote control of over 11,000 devices worldwide. The vulnerabilities also expose users' Wi-Fi passwords, potentially giving attackers a way into home networks.

Yarbo makes modular yard robots—one platform that can mow lawns, blow snow, and clear leaves by swapping out attachments. These devices connect to the cloud (the internet-based servers that let you control them remotely), but that same cloud connection is where the security problems lie.

What the Vulnerabilities Are

The core issue is surprisingly basic: Yarbo uses the same hardcoded root password—think of it as a master key—across every single device. This is the kind of security mistake textbooks warn against. Proper security means each device should have its own unique authentication credentials, not a shared password that could be discovered once and used everywhere.

Research shows the vulnerabilities go beyond just device control. According to Times of India, hackers can also pull Wi-Fi usernames and passwords from the robots. TechSpot reports this creates a secondary risk: once attackers compromise a robot, they could use those stolen credentials to access other devices on the same home network—a technique called pivoting.

The Physical Risk

Yarbo's lawn mowers weigh around 200 pounds, have a 20-inch cutting system with adjustable blade heights from 1.2 to 4.0 inches, and can handle properties up to 6.2 acres on slopes as steep as 35 degrees. The snow blower attachment clears up to 12 inches across a 21-inch path.

Unlike typical smart home hacks—where an attacker might steal your data or spy through a camera—a compromised yard robot is a heavy piece of machinery running at someone else's command. A hacker controlling one remotely could damage property or create safety hazards.

We've seen this pattern before. In the mid-2010s, manufacturers were rushing smart home devices to market—cameras, routers, thermostats—without building in solid security. The result was botnets: networks of hacked devices controlled by criminals to launch attacks. Those lessons, it appears, haven't reached every company entering the connected device business.

The Bigger Picture

The broader context here is that connecting everyday objects to the internet is harder than it looks. Yarbo is a premium brand with a 2-year warranty, 24/7 support, and a 30-day return policy. The company markets itself as the first unified robotic yard care platform. Yet expensive marketing and good customer service did not translate into good security engineering.

This matters because thousands of these devices are already deployed in homes and businesses, likely representing millions of dollars in hardware. The fundamental authentication flaws that make them vulnerable to trivial remote takeover suggest the product was not properly reviewed for security before launch.

What Needs to Happen Now

Modern IoT security requires unique device certificates (digital proof of identity), secure boot processes (ensuring the device hasn't been tampered with when it powers on), and encrypted communication channels. Yarbo's devices appear to lack these fundamentals.

For anyone using robotic yard equipment, the lesson is straightforward: check your vendor's security practices the same way you check their warranty. For organizations deploying these systems, network isolation—keeping connected robots on a separate network from sensitive systems—and monitoring for unusual behavior become critical safeguards.

There's an important caveat worth noting: even if Yarbo releases a firmware update to fix the hardcoded password, the Wi-Fi credentials may already be compromised. Attackers who've downloaded stolen passwords could maintain access to home networks through other methods, side-stepping the fix. This is why Wi-Fi credential exposure creates lingering risk.

The pattern holding across the connected device industry is consistent: manufacturers achieve market success first, then mature their security practices later, if at all. As physical robots expand beyond hobbyist yards into commercial facilities and operational technology environments, that lag becomes harder to tolerate.