CVE-2023-4473

Published: Nov 30, 2023

Modified: Dec 16, 2025

PUBLISHED

CVSS v3.1

9.8

CRITICAL

Description

A command injection vulnerability in the web server of the Zyxel NAS326 firmware version V5.21(AAZF.14)C0 and NAS542 firmware version V5.21(ABAG.11)C0 could allow an unauthenticated attacker to execute some operating system (OS) commands by sending a crafted URL to a vulnerable device.

Vendor	Product	Versions
Zyxel	NAS326 firmware	affected `V5.21(AAZF.14)C0`
Zyxel	NAS542 firmware	affected `V5.21(ABAG.11)C0`

Weaknesses (CWE)

CWE-78

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

References

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-authentication-bypass-and-command-injection-vulnerabilities-in-nas-products

vendor-advisory

https://bugprove.com/knowledge-hub/cve-2023-4473-and-cve-2023-4474-authentication-bypass-and-multiple-blind-os-command-injection-vulnerabilities-in-zyxel-s-nas-326-devices/

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CVE-2023-4473

Description

Affected Products

Weaknesses (CWE)

CVSS v3.1 Details

References