22 BRIDGE:BREAK Flaws Expose Thousands of Lantronix and Silex Serial-to-IP Converters

Ravie LakshmananApr 21, 2026Network Security / Vulnerability

Cybersecurity researchers have identified 22 new vulnerabilities in popular models of serial-to-IP converters from Lantronix and Silex that could be exploited to hijack susceptible devices and tamper with data exchanged by them.

The vulnerabilities have been collectively codenamed BRIDGE:BREAK by Forescout Research Vedere Labs, which identified nearly 20,000 Serial-to-Ethernet converters exposed online globally.

“Some of these vulnerabilities allow attackers to take full control of mission-critical devices connected via serial links,” the cybersecurity company said in a report shared with The Hacker News.

Serial-to-IP converters are hardware devices that enable users to remotely access, control, and manage any serial device over an IP network or the internet by “bridging” legacy applications and industrial control systems (ICS) that operate over TCP/IP.

At a high level, as many as eight security flaws have been discovered in Lantronix products (EDS3000PS Series and EDS5000 Series) and 14 in Silex SD330-AC. These shortcomings fall under the following broad categories –

Remote code execution – CVE-2026-32955, CVE-2026-32956, CVE-2026-32961, CVE-2025-67041, CVE-2025-67034, CVE-2025-67035, CVE-2025-67036, CVE-2025-67037, and CVE-2025-67038
Client-side code execution – CVE-2026-32963
Denial-of-service (DoS) – CVE-2026-32961, CVE-2015-5621, CVE-2024-24487
Authentication bypass – CVE-2026-32960, CVE-2025-67039
Device takeover – FSCT-2025-0021 (no CVE assigned), CVE-2026-32965, CVE-2025-70082
Firmware tampering – CVE-2026-32958
Configuration tampering – CVE-2026-32962, CVE-2026-32964
Information disclosure – CVE-2026-32959
Arbitrary file upload – CVE-2026-32957

Successful exploitation of the aforementioned flaws could allow attackers to disrupt serial communications with field assets, conduct lateral movement, and tamper with sensor values or modify actuator behavior.

In a hypothetical attack…

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