CVE-2026-84409

Lantronix G520 Series Cellular Gateway Cross-site Scripting

State
Published
Severity
7.7 High
Published
Sep 29, 2026
Updated
Sep 30, 2026
Reserved
Sep 17, 2026

Read the record on cve.org

Description

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.

Scores

CVSSScoreVectorSource
4.07.7 HighCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:Nicscert
3.17.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:Hicscert

Weaknesses

Affected Products

ProductVersions
G520 SeriesLantronix
  • 2.6.0.4R6 stableAffected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.