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CVE-2023-27992

Quick assessment

Affected
Zyxel NAS326 firmware
Exploitation
Confirmed exploitation in the wild; remediate immediately
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Zyxel NAS326是中国合勤（Zyxel）公司的一款云存储 NAS。 Zyxel NAS326 V5.21(AAZF.14)C0之前固件版本、NAS540 V5.21(AATB.11)C0之前固件版本、NAS542V5.21之前固件版本存在安全漏洞，该漏洞源于许未经身份验证的攻击者通过发送精心设计的 HTTP 请求远程执行某些操作系统 (OS) 命令。

CVSS 9.8 · Critical KEV EPSS 82.83% · P100
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I. Basic Information for CVE-2023-27992

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Zyxel NAS326 操作系统命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Zyxel NAS326是中国合勤（Zyxel）公司的一款云存储 NAS。 Zyxel NAS326 V5.21(AAZF.14)C0之前固件版本、NAS540 V5.21(AATB.11)C0之前固件版本、NAS542V5.21之前固件版本存在安全漏洞，该漏洞源于许未经身份验证的攻击者通过发送精心设计的 HTTP 请求远程执行某些操作系统 (OS) 命令。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
Zyxel NAS326 firmware < V5.21(AAZF.14)C0 -
Zyxel NAS540 firmware < V5.21(AATB.11)C0 -
Zyxel NAS542 firmware < V5.21(ABAG.11)C0 -

II. Public POCs for CVE-2023-27992

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III. Intelligence Information for CVE-2023-27992

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Other References for CVE-2023-27992 (1)

IV. Related Vulnerabilities

Same product: NAS326 firmware
Same vendor: Zyxel
Same weakness: CWE-78

V. Comments for CVE-2023-27992

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