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CVE-2021-27256

EPSS 0.56% · P68
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I. Basic Information for CVE-2021-27256

Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Description
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R7800 firmware version 1.0.2.76. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the handling of the rc_service parameter provided to apply_save.cgi. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-12355.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
Vulnerability Title
Netgear NETGEAR R7800 操作系统命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Netgear NETGEAR R7800是美国网件（Netgear）公司的一款无线路由器。 NETGEAR R7800 存在操作系统命令注入漏洞，该漏洞源于使用用户提供的字符串执行系统调用之前，没有对它进行适当的验证。攻击者可利用该漏洞在root上下文中执行代码。
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

VendorProductAffected VersionsCPESubscribe
NETGEARR7800 firmware version 1.0.2.76 -

II. Public POCs for CVE-2021-27256

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III. Intelligence Information for CVE-2021-27256

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Same Patch Batch · NETGEAR · 2021-03-05 · 4 CVEs total

CVE-2021-27254Netgear NETGEAR 信任管理问题漏洞
CVE-2021-27255Netgear NETGEAR R7800 访问控制错误漏洞
CVE-2021-27257Netgear NETGEAR R7800 信任管理问题漏洞

IV. Related Vulnerabilities

Same product: R7800
Same vendor: NETGEAR
Same weakness: CWE-78

V. Comments for CVE-2021-27256

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