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CVE-2026-5349— Trendnet TEW-657BRM setup.cgi add_apcdb stack-based overflow

Quick assessment

Affected

Trendnet TEW-657BRM

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-657BRM是美国趋势网络（TRENDnet）公司的一个WiFi路由器。 TRENDnet TEW-657BRM 1.00.1版本存在安全漏洞，该漏洞源于对文件/setup.cgi中add_apcdb函数参数mac_pc_dba的错误操作，可能导致栈缓冲区溢出。

CVSS 8.8 · High EPSS 0.77% · P53 Updated Apr 03, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

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I. Basic Information for CVE-2026-5349

Vulnerability Information

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Vulnerability Title

Trendnet TEW-657BRM setup.cgi add_apcdb stack-based overflow

Source: CVE Program / CVE List V5

Vulnerability Description

A vulnerability was identified in Trendnet TEW-657BRM 1.00.1. The affected element is the function add_apcdb of the file /setup.cgi. The manipulation of the argument mac_pc_dba leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit is publicly available and might be used. The vendor confirms, that "[t]he product in question (...) has been discontinued and end of life since June 23, 2011, that is more than 14 years ago. We no longer provide support for this product, so we are not able to confirm the vulnerabilities. We will make an announcement on our website's product support page and notify customers who registered their products with us." This vulnerability only affects products that are no longer supported by the maintainer.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/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-657BRM 安全漏洞

Source: CNNVD (China National Vulnerability Database)

Vulnerability Description

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-657BRM	1.00.1	`cpe:2.3:o:trendnet:tew-657brm_firmware::::::::`

II. Public POCs for CVE-2026-5349

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-5349

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Vendor Advisories for CVE-2026-5349 (2)

🔗 Submit #781563: TRENDnet TEW-657BRM 1.00.1 Buffer Overflow Read full article third-party-advisory
🔗 CVE-2026-5349 Trendnet TEW-657BRM setup.cgi add_apcdb stack-based overflow Read full article vdb-entry technical-description

Other References for CVE-2026-5349 (1)

🔗 vuls/trendnet/tew-657brm/add_apcdb.md at main · panda666-888/vuls · GitHub Read full article exploit

https://www.cve.org/CVERecord?id=CVE-2026-5349

Same Patch Batch · Trendnet · 2026-04-02 · 7 CVEs total

CVE-2026-5350	8.8 HIGH	Trendnet TEW-657BRM setup.cgi update_pcdb stack-based overflow
CVE-2026-5354	6.3 MEDIUM	Trendnet TEW-657BRM setup.cgi vpn_connect os command injection
CVE-2026-5352	6.3 MEDIUM	Trendnet TEW-657BRM setup.cgi edit os command injection
CVE-2026-5353	6.3 MEDIUM	Trendnet TEW-657BRM setup.cgi ping_test os command injection
CVE-2026-5351	6.3 MEDIUM	Trendnet TEW-657BRM setup.cgi add_wps_client os command injection
CVE-2026-5355	6.3 MEDIUM	Trendnet TEW-657BRM setup.cgi vpn_drop os command injection

IV. Related Vulnerabilities

Same product: TEW-657BRM

Same vendor: Trendnet

Same weakness: CWE-121

V. Comments for CVE-2026-5349

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Goal Reached Thanks to every supporter — we hit 100%!

CVE-2026-5349— Trendnet TEW-657BRM setup.cgi add_apcdb stack-based overflow

Quick assessment

Possible ATT&CK Techniques 1 AI

I. Basic Information for CVE-2026-5349

Vulnerability Information

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Affected Products

II. Public POCs for CVE-2026-5349

III. Intelligence Information for CVE-2026-5349

Vendor Advisories for CVE-2026-5349 (2)

Other References for CVE-2026-5349 (1)

Same Patch Batch · Trendnet · 2026-04-02 · 7 CVEs total

IV. Related Vulnerabilities

V. Comments for CVE-2026-5349

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