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I. Basic Information for CVE-2026-2966
Vulnerability Information

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Vulnerability Title
Cesanta Mongoose DNS Transaction ID dns.c mg_sendnsreq random values
Source: NVD (National Vulnerability Database)
Vulnerability Description
A weakness has been identified in Cesanta Mongoose up to 7.20. The impacted element is the function mg_sendnsreq of the file /src/dns.c of the component DNS Transaction ID Handler. Executing a manipulation of the argument random can lead to insufficiently random values. The attack can be launched remotely. The attack requires a high level of complexity. The exploitability is regarded as difficult. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
使用不充分的随机数
Source: NVD (National Vulnerability Database)
Vulnerability Title
Cesanta Mongoose 安全特征问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cesanta Mongoose是爱尔兰Cesanta公司的一套嵌入式服务器库,它包括TCP、HTTP客户端和服务器、WenSocket客户端和服务器等功能。 Cesanta Mongoose 7.20及之前版本存在安全特征问题漏洞,该漏洞源于对组件DNS Transaction ID Handler中文件/src/dns.c的函数mg_sendnsreq的参数random的错误操作,可能导致随机性不足。
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
CesantaMongoose 7.0 cpe:2.3:a:cesanta:mongoose:*:*:*:*:*:*:*:*
II. Public POCs for CVE-2026-2966
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III. Intelligence Information for CVE-2026-2966
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IV. Related Vulnerabilities
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