CVE-2026-75784
Received Received - Intake

Stack-Based Buffer Overflow in TRENDnet TEW-WLC100 Firmware

Vulnerability report for CVE-2026-75784, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-08-18

Last updated on: 2026-08-18

Assigner: VulDB

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.

CVSS Scores

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Meta Information

Published
2026-08-18
Last Modified
2026-08-18
Generated
2026-08-18
AI Q&A
2026-08-18
EPSS Evaluated
N/A
NVD
EUVD

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
trendnet tew-wlc100 1v2.07b01

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-121 A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
CWE-119 The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

Attack-Flow Graph

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Executive Summary

CVE-2026-75784 is a stack-based buffer overflow vulnerability in TRENDnet TEW-WLC100 Wireless Controller v1v2.07b01. It affects the HTTP header handler in the nginx component, specifically the Server argument. Attackers can remotely exploit this by sending a crafted HTTP request with a maliciously long Server header, causing a stack overflow and potentially executing arbitrary code.

Detection Guidance

Detect this vulnerability by monitoring network traffic for unusually long HTTP Server headers. Use tools like Wireshark to inspect HTTP requests targeting port 80 on the TEW-WLC100 device. Check for malformed requests with excessive header lengths.

Impact Analysis

This vulnerability allows remote attackers to execute arbitrary code on the affected device. An attacker could take control of the device, steal sensitive data, or disrupt network operations. Since the exploit is public, the risk of widespread attacks is high.

Mitigation Strategies

Immediately update the TEW-WLC100 firmware to the latest patched version. If no patch is available, restrict access to the device's web interface via network segmentation or firewall rules. Disable unnecessary services and monitor for suspicious activity.

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