OS Command Injection Vulnerability in Trendnet TEW-657BRM Router
CVE-2026-5355

5.3MEDIUM

Key Information:

Vendor

Trendnet

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

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-5355?

A vulnerability exists in the Trendnet TEW-657BRM router, specifically within the 'vpn_drop' function in the 'setup.cgi' file. This flaw allows attackers to inject operating system commands by manipulating the 'policy_name' argument. The vulnerability can be exploited remotely, posing a risk to users. It's important to note that this product has been discontinued since June 23, 2011, meaning it is no longer supported or receives security updates from the vendor. Users of the TEW-657BRM should be aware of this risk and take appropriate measures to secure their networks.

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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-2026-5355 - Proof of Concept

References

https://vuldb.com/vuln/354708
vdb-entrytechnical-description
https://vuldb.com/vuln/354708/cti
signaturepermissions-required
https://vuldb.com/submit/781569
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
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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