IM
IronMonkey Threat Research
‹ Back to ICS Advisories

Lantronix G520 Series Cellular Gateway

HIGH
CVSS 7.5
Date 2026-09-29T06:00:00+00:00
Source cisa-csaf
Published by CISA

// Description

Successful exploitation of these vulnerabilities could allow an attacker to replace software and execute arbitrary code with root privileges.

// Vulnerabilities (2)

CVE ID CVSS Score Severity Description
CVE-2026-84409 7.5 high
The device's update mechanism retrieves metadata for software updates over an unencrypted HTTP connection and stores portions of that metadata for later use. A management interface subsequently returns this stored value in a JSON response, and the web interface responsible for displaying update information inserts that value directly into the page as HTML. This behavior allows attacker‑controlled metadata to be interpreted as script content. In addition, the same authenticated origin provides an interface capable of executing system‑level commands with root privileges. An attacker able to influence update metadata could exploit these conditions to execute arbitrary code within the administrative context of the device.
CVE-2026-91191 7.5 high
The device's update mechanism includes conditions that allow unauthorized software packages to be accepted as authentic. During the boot process, the stock done function disables signature verification in the OPKG configuration before restoring optional packages from a writable, unsigned feed. Separately, the publicly distributed SDK contains the production private key whose corresponding public key is trusted by both stable and beta firmware builds. Either issue undermines package authenticity, and together they allow an attacker to provide packages that appear valid to the system. Even if signature enforcement is restored, the exposed production key enables an attacker to generate signatures that the device will continue to trust. An attacker who can supply a malicious package may be able to execute arbitrary code with root privileges during installation.

// Remediations (3)

Mitigation: For more information or technical assistance, contact Lantronix support: [email protected]
For more information or technical assistance, contact Lantronix support: [email protected]
Mitigation: Lantronix has addressed the reported issues with release version 2.6.0.7R6 which is available on the
Lantronix has addressed the reported issues with release version 2.6.0.7R6 which is available on their website.
Mitigation: For more information, see the Lantronix Vulnerability Library.
For more information, see the Lantronix Vulnerability Library.

// References