CVE-2018-20219

HIGH

Teracue ENC-400 <2.56 - Auth Bypass

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2018-20219.

AI-analyzed exploit summary This is a detailed technical writeup describing multiple vulnerabilities in the Teracue ENC-400 device, including command injection (CVE-2018-20218), hard-coded authentication token (CVE-2018-20219), and missing authentication on sensitive endpoints (CVE-2018-20220). It includes code snippets, root cause analysis, and resolution status for each issue.

Description

An issue was discovered on Teracue ENC-400 devices with firmware 2.56 and below. After successful authentication, the device sends an authentication cookie to the end user such that they can access the devices web administration panel. This token is hard-coded to a string in the source code (/usr/share/www/check.lp file). By setting this cookie in a browser, an attacker is able to maintain access to every ENC-400 device without knowing the password, which results in authentication bypass. Even if a user changes the password on the device, this token is static and unchanged.

Exploits (1)

exploitdb WRITEUP
webappshardware
https://www.exploit-db.com/exploits/46451

This is a detailed technical writeup describing multiple vulnerabilities in the Teracue ENC-400 device, including command injection (CVE-2018-20218), hard-coded authentication token (CVE-2018-20219), and missing authentication on sensitive endpoints (CVE-2018-20220). It includes code snippets, root cause analysis, and resolution status for each issue.

Classification
Writeup 100%
Attack Type
Auth Bypass
Complexity
Trivial
Reliability
Reliable
Target: Teracue ENC-400 firmware v2.56 or below
No auth needed
Prerequisites: Network access to the Teracue ENC-400 device
devstral-2 · analyzed Feb 19, 2026 Full analysis →

References (3)

Core 3
Core References
Mailing List, Third Party Advisory x_refsource_misc
http://seclists.org/fulldisclosure/2019/Feb/48
Not Applicable x_refsource_misc
https://zxsecurity.co.nz/research.html

Scores

CVSS v3 8.1
EPSS 0.1455
EPSS Percentile 96.2%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-798
Status published
Products (3)
teracue/enc-400_hdmi2_firmware < 2.56
teracue/enc-400_hdmi_firmware < 2.56
teracue/enc-400_hdsdi_firmware < 2.56
Published Mar 21, 2019
Tracked Since Feb 18, 2026