Stack-Based Buffer Overflow in Trendnet TEW-657BRM Router
CVE-2026-5350

8.7HIGH

Key Information:

Vendor

Trendnet

Status
Tew-657brm
Vendor
CVE Published:
2 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-5350?

A security vulnerability has been identified in the Trendnet TEW-657BRM router, specifically in the function update_pcdb within the /setup.cgi file. This issue arises from improper handling of the arg mac_pc_dba, leading to a stack-based buffer overflow. The threat actor can exploit this flaw remotely, potentially compromising the device's integrity. Notably, the product has been discontinued since June 2011, and Trendnet no longer supports it, leaving users vulnerable without official patches or mitigations. Awareness and precaution are essential for those still utilizing this outdated hardware.

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Affected Version(s)

TEW-657BRM 1.00.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-5350 - Proof of Concept

References

https://vuldb.com/vuln/354703
vdb-entrytechnical-description
https://vuldb.com/vuln/354703/cti
signaturepermissions-required
https://vuldb.com/submit/781567
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

panda_0x1 (VulDB User)
VulDB CNA Team
JSON
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