Stack-Based Buffer Overflow in TRENDnet TEW-WLC100 HTTP Header Functionality
CVE-2026-75784

10CRITICAL

Key Information:

Vendor

Trendnet

Status
Tew-wlc100
Vendor
CVE Published:
18 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-75784?

A significant vulnerability was identified in the TRENDnet TEW-WLC100, specifically in the HTTP Header Handler component. The issue arises from the improper handling of the 'Server' argument within the FUN_0040da4c function located at /usr/nginx/sbin/nginx, leading to a stack-based buffer overflow. This flaw can be exploited remotely, allowing an attacker to manipulate data in a way that may compromise system integrity. With the exploit now publicly accessible, it is crucial for users to address this vulnerability promptly to safeguard their systems.

Affected Version(s)

TEW-WLC100 1v2.07b01

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-75784 - Proof of Concept

References

https://vuldb.com/vuln/391525
vdb-entrytechnical-description
https://vuldb.com/vuln/391525/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-75784
third-party-advisory

CVSS V4

Score:
10
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

fuhanhan2014 (VulDB User)
.