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

0
Critical
VulnerabilityCVE-2026-76589cvecve-2026-76589
Published: 08/19/2026 (08/19/2026, 21:30:09 UTC)
Source: CVE Database V5
Vendor/Project: TRENDnet
Product: TEW-755AP

Description

CVE-2026-76589 is a critical stack-based buffer overflow vulnerability in the TRENDnet TEW-755AP device affecting the function FUN_401000 in /sbin/mycli. The vulnerability is triggered by manipulating the ssid argument and can be exploited remotely. Although an exploit has been publicly disclosed, there is no confirmed patch or official remediation available at this time.

CVSS v4.0

Score 9.4critical

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Vuln. Confidentiality
High
Vuln. Integrity
High
Vuln. Availability
High
Subsq. Confidentiality
High
Subsq. Integrity
High
Subsq. Availability
High
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 08/19/2026, 21:52:16 UTC

Technical Analysis

This vulnerability exists in TRENDnet TEW-755AP devices up to version 20260702. The flaw is a stack-based buffer overflow in the function FUN_401000 within the /sbin/mycli binary, caused by improper handling of the ssid argument. The vulnerability allows remote attackers to potentially execute arbitrary code or cause denial of service. The CVSS 4.0 base score is 9.4, indicating critical severity with network attack vector, low attack complexity, no privileges required, no user interaction, and high impacts on confidentiality, integrity, availability, and security requirements. Public exploit code is available, but no official patch or vendor advisory has been published yet.

Potential Impact

Successful exploitation can lead to remote code execution or denial of service on affected TRENDnet TEW-755AP devices. The vulnerability impacts confidentiality, integrity, availability, and security controls at a high level. Given the remote attack vector and no required privileges or user interaction, the risk to exposed devices is critical.

Mitigation Recommendations

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, affected users should consider network-level mitigations such as restricting access to the device management interface and monitoring for exploitation attempts. No vendor advisory or patch links are currently provided.

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Technical Details

Data Version
5.2
Assigner Short Name
VulDB
Date Reserved
2026-08-19T14:37:56.616Z
Cvss Version
4.0
State
PUBLISHED
Remediation Level
null

Threat ID: 6a862263acd9273b49a704d1

Added to database: 08/19/2026, 21:38:43 UTC

Last enriched: 08/19/2026, 21:52:16 UTC

Last updated: 08/19/2026, 22:21:48 UTC

Views: 5

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