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CVE-2026-76589— TRENDnet TEW-755AP mycli FUN_401000 stack-based overflow

Quick assessment

Affected
TRENDnet TEW-755AP
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

TRENDnet TEW-755AP是美国TRENDnet公司的一款无线接入点设备。 TRENDnet TEW-755AP 20260702及之前版本存在缓冲区错误漏洞，该漏洞源于/sbin/mycli文件中FUN_401000函数对ssid参数处理不当，存在栈缓冲区溢出，攻击者可能利用该漏洞进行远程攻击。

CVSS 9.9 · Critical EPSS 0.61% · P47

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
TRENDnet TEW-755AP 20260702 affected
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I. Basic Information for CVE-2026-76589

Vulnerability Information
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Vulnerability Title
TRENDnet TEW-755AP mycli FUN_401000 stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was found in TRENDnet TEW-755AP up to 20260702. Affected is the function FUN_401000 of the file /sbin/mycli. The manipulation of the argument ssid results in stack-based buffer overflow. The attack may be launched remotely. The exploit has been made public and could be used.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
TRENDnet TEW-755AP 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TRENDnet TEW-755AP是美国TRENDnet公司的一款无线接入点设备。 TRENDnet TEW-755AP 20260702及之前版本存在缓冲区错误漏洞，该漏洞源于/sbin/mycli文件中FUN_401000函数对ssid参数处理不当，存在栈缓冲区溢出，攻击者可能利用该漏洞进行远程攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
TRENDnet TEW-755AP 20260702 cpe:2.3:o:trendnet:tew-755ap_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-76589

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 8639 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-76589

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Proof of Concept for CVE-2026-76589 (2)

Same Patch Batch · TRENDnet · 2026-08-19 · 8 CVEs total

CVE-2026-76584 9.9 CRITICAL TRENDnet TV-IP751WIC alphapd set_time.cgi stack-based overflow
CVE-2026-76590 9.9 CRITICAL TRENDnet TEW-755AP ssi wan.cgi stack-based overflow
CVE-2026-75984 7.4 HIGH TRENDnet TEW-823DRU admin.cgi command injection
CVE-2026-75985 7.4 HIGH TRENDnet Router ping.cgi command injection
CVE-2026-76582 7.4 HIGH TRENDnet TEW-821DAP ssi ping.cgi system command injection
CVE-2026-76583 7.4 HIGH TRENDnet TV-IP751WIC alphapd set_time.cgi command injection
CVE-2026-76591 7.4 HIGH TRENDnet TEW-755AP ssi email.cgi log_email_server command injection

IV. Related Vulnerabilities

Same product: TEW-755AP
Same vendor: TRENDnet
Same weakness: CWE-121

V. Comments for CVE-2026-76589

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