CVE-2023-27992

CRITICALCISA KEV

9.8

Description

The pre-authentication command injection vulnerability in the Zyxel NAS326 firmware versions prior to V5.21(AAZF.14)C0, NAS540 firmware versions prior to V5.21(AATB.11)C0, and NAS542 firmware versions prior to V5.21(ABAG.11)C0 could allow an unauthenticated attacker to execute some operating system (OS) commands remotely by sending a crafted HTTP request.

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published6/19/2023

Last Modified10/27/2025

Sourcekev

Honeypot Sightings0

CISA KEV

VendorZyxel

ProductMultiple Network-Attached Storage (NAS) Devices

Vulnerability NameZyxel Multiple NAS Devices Command Injection Vulnerability

KEV Date Added2023-06-23

Remediation Due Date2023-07-14

Ransomware UseUnknown

Affected Products

zyxel:nas326zyxel:nas326_firmwarezyxel:nas540zyxel:nas540_firmwarezyxel:nas542zyxel:nas542_firmware

Weaknesses (CWE)

CWE-78CWE-78

References

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-pre-authentication-command-injection-vulnerability-in-nas-products(security@zyxel.com.tw)

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-pre-authentication-command-injection-vulnerability-in-nas-products(af854a3a-2127-422b-91ae-364da2661108)

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-27992(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.