Stack-based Buffer Overflow in TRENDnet TEW-755AP
CVE-2026-76590

9.4CRITICAL

Key Information:

Vendor

Trendnet

Status
Tew-755ap
Vendor
CVE Published:
19 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-76590?

A stack-based buffer overflow vulnerability exists in the TRENDnet TEW-755AP that affects the ssi component, specifically through the '/cgi-bin/wan.cgi' functionality. By manipulating the 'cameo.wan.wan_pppoe_password_00' argument, an attacker can exploit the vulnerability remotely. Publicly available exploits could be used to carry out attacks, making it critical for users to implement preventive measures immediately.

Affected Version(s)

TEW-755AP 20260702

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-2026-76590 - Proof of Concept

References

https://vuldb.com/vuln/393087
vdb-entrytechnical-description
https://vuldb.com/vuln/393087/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-76590
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)
.