Stack-based Buffer Overflow in TRENDnet TEW-823DRU Router
CVE-2026-75976

9.4CRITICAL

Key Information:

Vendor

Trendnet

Status
Tew-823dru
Vendor
CVE Published:
18 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-75976?

A significant vulnerability has been detected in the TRENDnet TEW-823DRU router, specifically within the NVRAM component's strcpy function located in /cgi-bin/wan.cgi. This vulnerability arises from improper handling of the wan_l2tp_password argument, leading to a stack-based buffer overflow. The attack can be executed remotely, raising concerns over unauthorized access and potential exploitation. Publicly available exploits increase the urgency for users and administrators to secure affected devices.

Affected Version(s)

TEW-823DRU 1.1.02b01

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-2026-75976 - Proof of Concept

References

https://vuldb.com/vuln/391892
vdb-entrytechnical-description
https://vuldb.com/vuln/391892/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-75976
third-party-advisory

CVSS V4

Score:
9.4
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

fuhanhan2015 (VulDB User)
.