Command Injection Vulnerability in Tenda G103 by Tenda
CVE-2026-5339

5.1MEDIUM

Key Information:

Vendor

Tenda
Status
G103
Vendor
CVE Published:
2 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-5339?

A command injection vulnerability exists in the Tenda G103's 'action_set_net_settings' function within the 'gpon.lua' file. This flaw allows remote attackers to manipulate several arguments, including authLoid, authPassword, and others, leading to potential unauthorized command execution. The vulnerability exposes the device to significant risks as the exploit method is now publicly available, necessitating immediate attention from users to safeguard their networks.

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Affected Version(s)

G103 1.0.0.5

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-2026-5339 - Proof of Concept

References

https://vuldb.com/vuln/354670
vdb-entrytechnical-description
https://vuldb.com/vuln/354670/cti
signaturepermissions-required
https://vuldb.com/submit/781132
third-party-advisory

CVSS V4

Score:
5.1
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

n0ps1ed (VulDB User)
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