Zyxel Multiple NAS Devices Command Injection Vulnerability

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Summary

CVECVE-2023-27992
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2023-06-19 12:15:00 UTC
Updated2023-06-27 12:49:00 UTC
DescriptionThe 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.

Risk And Classification

EPSS: 0.865320000 probability, percentile 0.994180000 (date 2026-04-22)

CISA KEV: Listed on 2023-06-23; due 2023-07-14; ransomware use Unknown

Problem Types: CWE-78

CISA Known Exploited Vulnerability

VendorZyxel
ProductMultiple Network-Attached Storage (NAS) Devices
NameZyxel Multiple NAS Devices Command Injection Vulnerability
Required ActionApply updates per vendor instructions.
Noteshttps://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-pre-authentication-command-injection-vulnerability-in-nas-products; https://nvd.nist.gov/vuln/detail/CVE-2023-27992

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Hardware Zyxel Nas326 - All All All
Operating System Zyxel Nas326 Firmware All All All All
Hardware Zyxel Nas540 - All All All
Operating System Zyxel Nas540 Firmware All All All All
Hardware Zyxel Nas542 - All All All
Operating System Zyxel Nas542 Firmware All All All All

References

ReferenceSourceLinkTags
Access denied | Zyxel Networks MISC www.zyxel.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
CISA Known Exploited Vulnerabilities catalog CISA www.cisa.gov kev

Legacy QID Mappings

  • 731362 For Vulnerability CVE-2023-27992
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