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CVE-2023-27992

nvd nist
Published: Jun 19, 2023Modified: Oct 27, 2025CISA KEV

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9.8
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitability: 3.9 / Impact: 5.9
Source: security@zyxel.com.tw (Secondary)

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.

Affected (3)

Zyxel
3 products
Nas326 Firmware
Nas540 Firmware
Nas542 Firmware
Configuration A
1 vulnerable · 1 platform
Vulnerable SoftwareAffected Versions
Nas326 Firmware
Before 5.21\(aazf.14\)c0
Running on/withPlatform Versions
Zyxel
Nas326
All versions
Configuration B
1 vulnerable · 1 platform
Vulnerable SoftwareAffected Versions
Nas540 Firmware
Before 5.21\(aatb.11\)c0
Running on/withPlatform Versions
Zyxel
Nas540
All versions
Configuration C
1 vulnerable · 1 platform
Vulnerable SoftwareAffected Versions
Nas542 Firmware
Before 5.21\(abag.11\)c0
Running on/withPlatform Versions
Zyxel
Nas542
All versions

Related CWEs

CWE-78
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

References (3)

Source: security@zyxel.com.tw
PatchVendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
PatchVendor Advisory
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
US Government Resource

Timeline

No history available yet.