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I. Basic Information for CVE-2026-3040
Vulnerability Information

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Vulnerability Title
DrayTek Vigor 300B Web Management uploadlangs cgiGetFile os command injection
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability was identified in DrayTek Vigor 300B up to 1.5.1.6. This affects the function cgiGetFile of the file /cgi-bin/mainfunction.cgi/uploadlangs of the component Web Management Interface. The manipulation of the argument File leads to os command injection. The attack may be initiated remotely. The exploit is publicly available and might be used. The vendor confirms that "300B is EoL, and this is an authenticated vulnerability. We don't plan to fix it." This vulnerability only affects products that are no longer supported by the maintainer.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
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
DrayTek Vigor 300B 操作系统命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
DrayTek Vigor 300B是中国居易(DrayTek)公司的一款运行在 Linux 系统上的 Quad-WAN 负载均衡宽带路由器。 DrayTek Vigor 300B 1.5.1.6及之前版本存在操作系统命令注入漏洞,该漏洞源于对组件Web Management Interface的文件/cgi-bin/mainfunction.cgi/uploadlangs中参数File的操作不当,可能导致os命令注入。
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
DrayTekVigor 300B 1.5.1.0 -
II. Public POCs for CVE-2026-3040
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III. Intelligence Information for CVE-2026-3040
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V. Comments for CVE-2026-3040

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