CVE-2021-4029

Severity Score

8.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Una vulnerabilidad de inyección de comandos en el programa CGI del firmware Zyxel ARMOR Z1/Z2 podría permitir a un atacante ejecutar comandos arbitrarios del sistema operativo por medio de una interfaz LAN

*Credits: N/A

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Adjacent

Attack Complexity

Low

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-11-29 CVE Reserved
2022-02-22 CVE Published
2024-08-03 CVE Updated
2024-11-07 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://www.zyxel.com/support/forgery-vulnerabilities-of-select-Armor-home-routers.shtml	2022-03-02

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Zyxel Search vendor "Zyxel"	Nbg6816 Firmware Search vendor "Zyxel" for product "Nbg6816 Firmware"	1.00\(aawb.10\)c0 Search vendor "Zyxel" for product "Nbg6816 Firmware" and version "1.00\(aawb.10\)c0"	-	Affected	in	Zyxel Search vendor "Zyxel"	Nbg6816 Search vendor "Zyxel" for product "Nbg6816"	-	-	Safe
Zyxel Search vendor "Zyxel"	Nbg6817 Firmware Search vendor "Zyxel" for product "Nbg6817 Firmware"	< 1.00\(abcs.11\)c0 Search vendor "Zyxel" for product "Nbg6817 Firmware" and version " < 1.00\(abcs.11\)c0"	-	Affected	in	Zyxel Search vendor "Zyxel"	Nbg6817 Search vendor "Zyxel" for product "Nbg6817"	-	-	Safe