CVE-2026-76589: Stack-based Buffer Overflow in TRENDnet TEW-755AP
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.
AI Analysis
Technical Summary
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.
CVE-2026-76589: Stack-based Buffer Overflow in TRENDnet 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
AI-Powered Analysis
Machine-generated threat intelligence
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.
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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