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CVE-2026-114382— TOTOLINK EX200 lan.so cstecgi.cgi setStaticDhcpConfig stack-based overflow

Quick assessment

Affected
TOTOLINK EX200
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.

在 TOTOLINK EX200 固件版本 5.2.3c.7200 中发现了一个安全漏洞。该漏洞影响 lan.so 组件中文件 /cgi-bin/cstecgi.cgi 内的 setStaticDhcpConfig 函数。攻击者可通过操纵 Comment 参数触发栈缓冲区溢出。此漏洞可被远程利用。相关利用代码已向公众发布，可能被用于发起攻击。

CVSS 10.0 · Critical

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-114382

Vulnerability Information
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Vulnerability Title
TOTOLINK EX200 lan.so cstecgi.cgi setStaticDhcpConfig stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A security flaw has been discovered in TOTOLINK EX200 5.2.3c.7200. This affects the function setStaticDhcpConfig of the file /cgi-bin/cstecgi.cgi of the component lan.so. The manipulation of the argument Comment results in stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
TOTOLINK EX200 5.2.3c.7200 cpe:2.3:o:totolink:ex200_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-114382

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III. Intelligence Information for CVE-2026-114382

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Proof of Concept for CVE-2026-114382 (1)

IV. Related Vulnerabilities

Same product: EX200
Same vendor: TOTOLINK
Same weakness: CWE-121

V. Comments for CVE-2026-114382

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