OS Command Injection Flaw in Trendnet TEW-657BRM Router
CVE-2026-5354

5.3MEDIUM

Key Information:

Vendor

Trendnet

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

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-5354?

A security flaw exists in the Trendnet TEW-657BRM router, specifically in the vpn_connect function of the /setup.cgi file. This vulnerability can be exploited remotely through crafted manipulation of the policy_name argument, potentially allowing attackers to execute arbitrary commands on the host operating system. The affected product has been discontinued since June 23, 2011, and Trendnet no longer provides support or updates for this router, meaning users should take immediate action to secure their systems.

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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-2026-5354 - Proof of Concept

References

https://vuldb.com/vuln/354707
vdb-entrytechnical-description
https://vuldb.com/vuln/354707/cti
signaturepermissions-required
https://vuldb.com/submit/781568
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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