OS Command Injection Vulnerability in Trendnet TEW-657BRM Router
CVE-2026-5353

5.3MEDIUM

Key Information:

Vendor

Trendnet

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

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-5353?

A vulnerability exists in the Trendnet TEW-657BRM router's /setup.cgi file related to the ping_test function. This flaw allows attackers to manipulate the c4_IPAddr argument, leading to remote OS command injection. As the product has been discontinued since June 23, 2011, Trendnet no longer offers support or patches, making it crucial for users still utilizing this device to take immediate action.

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-2026-5353 - Proof of Concept

References

https://vuldb.com/vuln/354706
vdb-entrytechnical-description
https://vuldb.com/vuln/354706/cti
signaturepermissions-required
https://vuldb.com/submit/781566
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
.