Stack-based Buffer Overflow in TRENDnet TEW-755AP by TRENDnet
CVE-2026-76589

9.4CRITICAL

Key Information:

Vendor

Trendnet

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

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-76589?

A vulnerability has been identified in the TRENDnet TEW-755AP that allows for a stack-based buffer overflow due to improper handling of the SSID argument in the /sbin/mycli file, specifically within the FUN_401000 function. This security flaw can potentially be exploited remotely, enabling attackers to execute arbitrary code and compromise device integrity. The exploit has been disclosed, raising concerns about the security of devices running affected versions.

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-2026-76589 - Proof of Concept

References

https://vuldb.com/vuln/393085
vdb-entrytechnical-description
https://vuldb.com/vuln/393085/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-76589
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)
.