22 Flaws in Serial-to-IP Converters Pose Major Cyber Risk

Michael Miller · 2026-04-21

Cybersecurity researchers have uncovered 22 new vulnerabilities in popular serial-to-IP converters from Lantronix and Silex. These flaws, collectively called BRIDGE:BREAK, could let attackers hijack devices and tamper with sensitive data. The research, conducted by Forescout Research Vedere Labs, found nearly 20,000 exposed Serial-to-Ethernet converters worldwide. If you're using these devices in your network, this is a wake-up call you can't ignore. ### What Are Serial-to-IP Converters? These gadgets connect older serial devices (like industrial controllers or medical equipment) to modern Ethernet networks. Think of them as translators—they take data from a serial port and send it over the internet. They're common in factories, hospitals, and energy plants. But when they're vulnerable, they become a backdoor for attackers. The BRIDGE:BREAK flaws affect specific models from Lantronix and Silex. Attackers could exploit them to: - Hijack device control - Intercept or alter data in transit - Launch further attacks on internal networks ### Why Should You Care? If you work in IT or OT security, these vulnerabilities are a big deal. Serial-to-IP converters are often overlooked, but they're critical infrastructure. A breach here could disrupt operations or leak confidential information. And with 20,000 devices exposed, the attack surface is massive. Here's what makes BRIDGE:BREAK especially dangerous: - No authentication required for some exploits - Remote exploitation possible without physical access - Devices often run outdated firmware with no patches ### What Can You Do? First, check if you're using affected models. Lantronix and Silex have released patches, so update your firmware immediately. Second, segment your network—don't let these devices talk to the internet directly. Use firewalls and VPNs to limit exposure. Third, monitor for unusual traffic. If something looks off, investigate fast. ### The Bigger Picture This isn't just about two vendors. It's about the Internet of Things (IoT) and operational technology (OT) security. As more devices connect, the risk grows. We need better security by design, not afterthought patches. For now, stay vigilant and keep your systems updated. ### Final Thoughts Don't wait for a breach to act. The BRIDGE:BREAK flaws are a reminder that every connected device is a potential entry point. Secure your converters today, and you'll sleep better tonight. If you need help, reach out to a cybersecurity professional—it's worth the investment.