CVE-2021-4029

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Published Feb 22, 2022 CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed

Description

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.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Zyxel

ARMOR Z2 (NBG6817) firmware

affected

Version	Status	Constraints
`1.00(ABCS.10)C0`	affected	—

Zyxel

ARMOR Z1 (NBG6816) firmware

affected

Version	Status	Constraints
`1.00(AAWB.10)C0`	affected	—

Configuration 1 [-]

AND

cpe:2.3:o:zyxel:nbg6816_firmware:1.00\(aawb.10\)c0:*:*:*:*:*:*:*

cpe:2.3:h:zyxel:nbg6816:-:*:*:*:*:*:*:*

Configuration 2 [-]

AND

cpe:2.3:o:zyxel:nbg6817_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:zyxel:nbg6817:-:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source	ID	Title
EUVD	EUVD-2021-33930	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.

Metrics

No CVSS v4.0

Attack Vector Adjacent Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

Access Vector Adjacent Network

Access Complexity Low

Authentication None

Confidentiality Impact Complete

Integrity Impact Complete

Availability Impact Complete

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.748% probability within 30 days)

Key SSVC decision points have not yet been added.

References

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

History

No history.

Subscriptions

Zyxel Nbg6816 Nbg6816 Firmware Nbg6817 Nbg6817 Firmware

Weaknesses

CWE-78

Sources

CVE record Updated: Aug 3, 2024, 5:16 PM

Status: PUBLISHED
Assigner: Zyxel
Published: Feb 22, 2022, 2:25 PM
Updated: Aug 3, 2024, 5:16 PM
Reserved: Nov 29, 2021, 12:00 AM

View source JSON

Vulnrichment No data

No data.

NVD Updated: Jun 17, 2026, 4:18 AM

Status: Modified
Published: Feb 24, 2022, 3:15 PM
Modified: Jun 17, 2026, 4:18 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

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