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CVE-2026-75784— TRENDnet TEW-WLC100 HTTP Header nginx FUN_0040da4c stack-based overflow

Quick assessment

Affected
TRENDnet TEW-WLC100
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 TRENDnet TEW-WLC100 1v2.07b01 中发现了一个漏洞。受影响的组件是 HTTP Header Handler，其中文件 /usr/nginx/sbin/nginx 中的函数 FUN_0040da4c 存在缺陷。对该函数的参数 Server 的操纵会导致基于栈的缓冲区溢出。该漏洞可被远程利用。目前该漏洞的利用代码已公开，可供攻击者使用。

CVSS 10.0 · Critical EPSS 1.02% · P60

Affected Version Matrix 1

VendorProduct Version RangeStatus
TRENDnet TEW-WLC100 1v2.07b01 affected
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I. Basic Information for CVE-2026-75784

Vulnerability Information
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Vulnerability Title
TRENDnet TEW-WLC100 HTTP Header nginx FUN_0040da4c stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was detected in TRENDnet TEW-WLC100 1v2.07b01. Affected by this issue is the function FUN_0040da4c of the file /usr/nginx/sbin/nginx of the component HTTP Header Handler. The manipulation of the argument Server results in stack-based buffer overflow. The attack may be launched remotely. The exploit is now public and may be used.
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
TRENDnet TEW-WLC100 1v2.07b01 cpe:2.3:a:trendnet:tew-wlc100:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-75784

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Qwen3.6-35B-A3B · 9471 chars
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III. Intelligence Information for CVE-2026-75784

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Proof of Concept for CVE-2026-75784 (2)

Same Patch Batch · TRENDnet · 2026-08-18 · 4 CVEs total

CVE-2026-75877 9.9 CRITICAL TRENDnet TV-IP751WIC alphapd FUN_0043372C stack-based overflow
CVE-2026-75976 9.9 CRITICAL TRENDnet TEW-823DRU NVRAM wan.cgi strcpy stack-based overflow
CVE-2026-75783 9.6 CRITICAL TRENDnet TEW-WLC100P DHCP blobmsg netifd stack-based overflow

IV. Related Vulnerabilities

Same product: TEW-WLC100
Same vendor: TRENDnet
Same weakness: CWE-121

V. Comments for CVE-2026-75784

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