Forescout's Vedere Labs disclosed 22 vulnerabilities in widely deployed serial-to-IP converters from Lantronix and Silex, including the Lantronix EDS3000PS and EDS5000 series and the Silex SD330-AC. The flaws, tracked under the BRIDGE:BREAK research initiative, can enable remote code execution, authentication bypass, arbitrary file upload, firmware and configuration tampering, denial of service, information disclosure, and full device takeover. Researchers said nearly 20,000 of these devices are reachable from the public internet, putting organizations in utilities, manufacturing, healthcare, and telecommunications at risk.
The affected devices are used to connect legacy serial equipment to modern IP networks, making them a critical bridge into OT environments where compromise could disrupt communications, support lateral movement, and let attackers manipulate sensor or actuator data. Forescout said firmware analysis also found outdated Linux kernels, inconsistent security protections, and large numbers of inherited open-source and kernel vulnerabilities, with many devices lacking mitigations such as ASLR. Lantronix and Silex have released security updates, and defenders are being urged to patch promptly, remove default credentials, enforce strong authentication, segment networks, monitor for anomalous internal traffic, and eliminate direct internet exposure.

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The CSIRT.SK reference states that Silex AMC Manager version 5.0.2 and earlier is also affected by BRIDGE:BREAK vulnerabilities and recommends upgrading to version 5.1.0 or later. It also notes interim mitigations for some Silex issues, including disabling HTTP/HTTPS or SNMP and setting a strong web administration password.
Following disclosure of the BRIDGE:BREAK vulnerabilities, Lantronix and Silex released security updates for impacted device models, including Lantronix EDS3000PS and EDS5000 Series devices and the Silex SD330-AC. Users were advised to patch promptly, change default credentials, strengthen authentication, segment networks, and avoid direct internet exposure.
As part of its BRIDGE:BREAK research, Forescout found nearly 20,000 to tens of thousands of serial-to-IP converters exposed online and observed that many devices used outdated Linux kernels and components with numerous known vulnerabilities. The researchers warned that exploitation could disrupt industrial operations, enable lateral movement, and allow manipulation of sensor or actuator data.
Forescout Research Vedere Labs discovered previously unknown vulnerabilities affecting Lantronix and Silex serial-to-IP converters used in industrial environments. The flaws could enable remote code execution, authentication bypass, device takeover, firmware or configuration tampering, denial of service, and information disclosure.
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