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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.

TRENDnet tew-823dru是美国TRENDnet公司的一款高性能无线路由器。 TRENDnet tew-823dru 1.1.02b01版本存在缓冲区错误漏洞，该漏洞源于对文件/cgi-bin/wan.cgi中参数wan_l2tp_password的错误操作，可能导致栈缓冲区溢出，攻击者可远程发起攻击。

CVSS 9.9 · Critical EPSS 0.85% · P57

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
Vulnerability Title
TRENDnet tew-823dru 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TRENDnet tew-823dru是美国TRENDnet公司的一款高性能无线路由器。 TRENDnet tew-823dru 1.1.02b01版本存在缓冲区错误漏洞，该漏洞源于对文件/cgi-bin/wan.cgi中参数wan_l2tp_password的错误操作，可能导致栈缓冲区溢出，攻击者可远程发起攻击。
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-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
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
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-75976

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Vendor Advisories for CVE-2026-75976 (1)

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

Other References 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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