What is the severity of CVE-2021-4029?

CVE-2021-4029 is classified as a high severity vulnerability due to the potential for executing arbitrary OS commands.

How do I fix CVE-2021-4029?

To mitigate CVE-2021-4029, update the firmware of your Zyxel ARMOR Z1/Z2 router to the latest version available from Zyxel.

What devices are affected by CVE-2021-4029?

CVE-2021-4029 affects the Zyxel ARMOR Z1 and Z2 routers, specifically the firmware version 1.00(aawb.10)c0 for NBG6816 and versions up to but not including 1.00(abcs.11)c0 for NBG6817.

What are the potential impacts of CVE-2021-4029?

Exploitation of CVE-2021-4029 could allow an attacker to gain unauthorized access and control over the affected Zyxel router.

How can I determine if my Zyxel router is vulnerable to CVE-2021-4029?

You can determine if your Zyxel router is vulnerable to CVE-2021-4029 by checking the firmware version against the known vulnerable versions listed in the CVE details.

Vulnerability/
CVE-2021-4029

high

8.8

CWE

78 77

22/2/2022

3/8/2024

CVE-2021-4029: OS Command Injection

First published: Tue Feb 22 2022(Updated: )

A command injection vulnerability in the CGI program of the Zyxel ARMOR Z1/Z2 firmware could allow an attacker to execute arbitrary OS commands via a LAN interface.

Credit: security@zyxel.com.tw

Affected Software	Affected Version	How to fix
Zyxel Nbg6816 Firmware	=1.00\(aawb.10\)c0
Zyxel Nbg6816
Zyxel Nbg6817 Firmware	<1.00\(abcs.11\)c0
Zyxel Nbg6817

Never miss a vulnerability like this again

Reference Links

https://www.zyxel.com/support/forgery-vulnerabilities-of-select-Armor-home-routers.shtml

Frequently Asked Questions

What is the severity of CVE-2021-4029?
CVE-2021-4029 is classified as a high severity vulnerability due to the potential for executing arbitrary OS commands.
How do I fix CVE-2021-4029?
To mitigate CVE-2021-4029, update the firmware of your Zyxel ARMOR Z1/Z2 router to the latest version available from Zyxel.
What devices are affected by CVE-2021-4029?
CVE-2021-4029 affects the Zyxel ARMOR Z1 and Z2 routers, specifically the firmware version 1.00(aawb.10)c0 for NBG6816 and versions up to but not including 1.00(abcs.11)c0 for NBG6817.
What are the potential impacts of CVE-2021-4029?
Exploitation of CVE-2021-4029 could allow an attacker to gain unauthorized access and control over the affected Zyxel router.
How can I determine if my Zyxel router is vulnerable to CVE-2021-4029?
You can determine if your Zyxel router is vulnerable to CVE-2021-4029 by checking the firmware version against the known vulnerable versions listed in the CVE details.

collector/nvd-index
agent/weakness
agent/type
agent/softwarecombine
collector/mitre-cve
source/MITRE
agent/author
agent/references
agent/severity
agent/last-modified-date
agent/description
agent/first-publish-date
agent/event
agent/tags
agent/source
vendor/zyxel
canonical/zyxel nbg6816 firmware
version/zyxel nbg6816 firmware/1.00\(aawb.10\)c0
canonical/zyxel nbg6816
canonical/zyxel nbg6817 firmware
canonical/zyxel nbg6817

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co

By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.