Lantronix G520 Series Cellular Gateway Cross-site Scripting
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Passive
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-84409
- 2026-10-03 Alias added: GHSA-32j5-669h-cw7p
References
Other 4
- https://ltrxdev.atlassian.net/wiki/spaces/LTRXTS/pages/1889828865/Latest+firmware+for+the+G520+Series+G526+G526RP+G527+G528
- https://www.lantronix.com/technical-support/security-updates/vulnerability-disclosure-policy/vulnerability-library/
- https://www.cisa.gov/news-events/ics-advisories/icsa-26-272-01
- https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-272-01.json
More Lantronix vulnerabilities
- TI-2025-41112 Lantronix EDS5000, G520, and X300 OS Command Injection KEVCVSS 4.0CRITICAL 9.3
- TI-2021-04926 OS command injection in Lantronix CVSS 3.1CRITICAL 9.9
- TI-2021-04937 Stack-based buffer overflow in Lantronix CVSS 3.1CRITICAL 9.9
- TI-2026-55403 Lantronix Autonomous Out-of-Band Devices Unauthenticated Authentication Bypass via snprintf Path Truncation CVSS 4.0CRITICAL 10.0
- TI-2021-04928 OS command injection in Lantronix CVSS 3.1CRITICAL 9.9
- TI-2021-04917 OS command injection in Lantronix CVSS 3.1CRITICAL 9.9
Sources
- CVE-2026-84409 · CVE Program
- CVE-2026-84409 · NVD
- FIRST EPSS
- GHSA-32j5-669h-cw7p · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences