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CVE-2021-4039

Quick assessment

Affected
Zyxel NWA1100-NH firmware
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Zyxel Nwa-1100-Nh是中国合勤科技（Zyxel）公司的一种远程 Poe 接入点。 Zyxel NWA-1100-NH 存在操作系统命令注入漏洞，该漏洞源于Zyxel NWA-1100-NH 固件的 Web 界面中的命令注入漏洞可能允许攻击者在设备上执行任意操作系统命令。

CVSS 9.8 · Critical EPSS 71.05% · P99

Public Exploits 1

ExploitDB · 1 EDB-50870 [remote]

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-4039

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A command injection vulnerability in the web interface of the Zyxel NWA-1100-NH firmware could allow an attacker to execute arbitrary OS commands on the device.
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 Nwa-1100-Nh 操作系统命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Zyxel Nwa-1100-Nh是中国合勤科技（Zyxel）公司的一种远程 Poe 接入点。 Zyxel NWA-1100-NH 存在操作系统命令注入漏洞，该漏洞源于Zyxel NWA-1100-NH 固件的 Web 界面中的命令注入漏洞可能允许攻击者在设备上执行任意操作系统命令。
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)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Zyxel NWA1100-NH firmware 2.12(AASI.0)C0 -

II. Public POCs for CVE-2021-4039

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2021-4039

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Exploits & Public PoCs for CVE-2021-4039 (1)

Other References for CVE-2021-4039 (1)

IV. Related Vulnerabilities

Same vendor: Zyxel
Same weakness: CWE-78

V. Comments for CVE-2021-4039

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