Command Injection Vulnerability in Totolink A3300R Router
CVE-2026-5178

5.3MEDIUM

Key Information:

Vendor

Totolink
Status
A3300r
Vendor
CVE Published:
31 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-5178?

The Totolink A3300R router has a command injection vulnerability within the function setIptvCfg of the cstecgi.cgi file. By manipulating the vlanPriLan3 argument, an attacker can execute arbitrary commands on the affected device. This vulnerability allows for remote exploitation, posing a significant risk to networks using this router. It is crucial for users to update their devices and apply any available security patches to mitigate this risk. Public disclosure of the exploit may increase the danger as potential attackers become aware of how to leverage this weakness.

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Affected Version(s)

A3300R 17.0.0cu.557_b20221024

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-2026-5178 - Proof of Concept

References

https://vuldb.com/vuln/354246
vdb-entrytechnical-description
https://vuldb.com/vuln/354246/cti
signaturepermissions-required
https://vuldb.com/submit/779147
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

LvHW (VulDB User)
JSON
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