CVE-2020-28899

CriticalCVSS 9.1/10Last modified Jun 17, 2026

Description

The Web CGI Script on ZyXEL LTE4506-M606 V1.00(ABDO.2)C0 devices does not require authentication, which allows remote unauthenticated attackers (via crafted JSON action data to /cgi-bin/gui.cgi) to use all features provided by the router. Examples: change the router password, retrieve the Wi-Fi passphrase, send an SMS message, or modify the IP forwarding to access the internal network.

Metrics

CVSS 3.1 9.1/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Weakness enumeration

CWE-306

Affected software

No affected versions have been published.

Timeline

Published
Mar 16, 2021
Last modified
Jun 17, 2026
NVD status
Modified

Related CVEs from 2020

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CVE-2020-28899: Critical severity, CVSS 9.1 | Vulnix