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CVE-2021-27239

Quick assessment

Affected
NETGEAR Multiple Routers
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Netgear NETGEAR R6400和NETGEAR R6700都是美国网件（Netgear）公司的一款无线路由器。 NETGEAR R6400 and R6700 firmware version 1.0.4.98 routers存在安全漏洞，攻击者可利用该漏洞在由器上执行任意代码，利用此漏洞不需要身份验证。

AI Predicted 9.8 Difficulty: Easy EPSS 0.74% · P53
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I. Basic Information for CVE-2021-27239

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6400 and R6700 firmware version 1.0.4.98 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the upnpd service, which listens on UDP port 1900 by default. A crafted MX header field in an SSDP message can trigger an overflow of a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-11851.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Netgear NETGEAR R6400 and R6700 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Netgear NETGEAR R6400和NETGEAR R6700都是美国网件（Netgear）公司的一款无线路由器。 NETGEAR R6400 and R6700 firmware version 1.0.4.98 routers存在安全漏洞，攻击者可利用该漏洞在由器上执行任意代码，利用此漏洞不需要身份验证。
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
NETGEAR Multiple Routers firmware version 1.0.4.98 -

II. Public POCs for CVE-2021-27239

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III. Intelligence Information for CVE-2021-27239

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Other References for CVE-2021-27239 (1)

Same Patch Batch · NETGEAR · 2021-03-29 · 6 CVEs total

CVE-2021-27276 NETGEAR ProSAFE Network Management System 路径遍历漏洞
CVE-2021-27275 NETGEAR ProSAFE Network Management System 路径遍历漏洞
CVE-2021-27273 NETGEAR ProSAFE Network Management System 操作系统命令注入漏洞
CVE-2021-27274 NETGEAR ProSAFE Network Management System 代码问题漏洞
CVE-2021-27272 NETGEAR ProSAFE Network Management System 路径遍历漏洞

IV. Related Vulnerabilities

Same product: Multiple Routers
Same vendor: NETGEAR
Same weakness: CWE-121

V. Comments for CVE-2021-27239

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