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CVE-2026-75976— TRENDnet TEW-823DRU NVRAM wan.cgi strcpy stack-based overflow

Quick assessment

Affected
TRENDnet TEW-823DRU
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.

在 TRENDnet TEW-823DRU 1.1.02b01 中已发现一个弱点。受影响的是 NVRAM 组件中文件 的 函数。对参数 的操纵会导致基于栈的缓冲区溢出。该漏洞可由远程发起攻击。该漏洞的利用代码已公开，可能被用于实施攻击。

CVSS 9.9 · Critical EPSS 0.63% · P47

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
TRENDnet TEW-823DRU 1.1.02b01 affected
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I. Basic Information for CVE-2026-75976

Vulnerability Information
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Vulnerability Title
TRENDnet TEW-823DRU NVRAM wan.cgi strcpy stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A weakness has been identified in TRENDnet TEW-823DRU 1.1.02b01. Impacted is the function strcpy of the file /cgi-bin/wan.cgi of the component NVRAM. This manipulation of the argument wan_l2tp_password causes stack-based buffer overflow. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks.
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
TRENDnet TEW-823DRU 1.1.02b01 cpe:2.3:a:trendnet:tew-823dru:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-75976

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Qwen3.6-35B-A3B · 10240 chars
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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-2026-75976

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Proof of Concept for CVE-2026-75976 (2)

Same Patch Batch · TRENDnet · 2026-08-18 · 4 CVEs total

CVE-2026-75784 10.0 CRITICAL TRENDnet TEW-WLC100 HTTP Header nginx FUN_0040da4c stack-based overflow
CVE-2026-75877 9.9 CRITICAL TRENDnet TV-IP751WIC alphapd FUN_0043372C stack-based overflow
CVE-2026-75783 9.6 CRITICAL TRENDnet TEW-WLC100P DHCP blobmsg netifd stack-based overflow

IV. Related Vulnerabilities

Same product: TEW-823DRU
Same vendor: TRENDnet
Same weakness: CWE-121

V. Comments for CVE-2026-75976

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