Talos Vulnerability Report


Lantronix XPort EDGE Web Manager and telnet CLI cleartext transmission of sensitive information vulnerability

December 16, 2020
CVE Number



An information disclosure vulnerability exists in the Web Manager and telnet CLI functionality of Lantronix XPort EDGE,, and A specially crafted HTTP request can cause information disclosure. An attacker can sniff the network to trigger this vulnerability.

Tested Versions

Lantronix XPort EDGE
Lantronix XPort EDGE
Lantronix XPort EDGE
Lantronix XPort EDGE

Product URLs


CVSSv3 Score

3.1 - CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N


CWE-319 - Cleartext Transmission of Sensitive Information


The XPort EDGE is a next-generation wired Ethernet gateway for providing secure Ethernet connectivity to serial devices.

When configuring secure credentials for the Lantronix XPort EDGE, TLS private keys and AES encryption and decryption keys are transmitted in cleartext over the network. An attacker can sniff the network communications during configuration and capture these keys. The attacker would then have the ability to man in the middle encrypted communications using these keys.


2020-08-10 - Vendor Disclosure
2020-12-16 - Public Release


Discovered by Kelly Leuschner of Cisco Talos.