Critical severity9.8NVD Advisory· Published Nov 30, 2023· Updated Jun 17, 2026

CVE-2023-4473

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Zyxel/NAS326llm-fuzzy
Range: V5.21(AAZF.14)C0
Zyxel/NAS542llm-fuzzy
Range: V5.21(ABAG.11)C0
Zyxel/NAS326 firmwarev5
Range: V5.21(AAZF.14)C0
Zyxel/NAS542 firmwarev5
Range: V5.21(ABAG.11)C0

Patches

Vulnerability mechanics

References

www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-authentication-bypass-and-command-injection-vulnerabilities-in-nas-productsnvdPatchVendor Advisory
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/nvd

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cvss	0.637
epss	0.033
exploit	0.000
kev	0.000
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ransomware	0.000