CVE-2026-5339 Details
Description
A vulnerability was detected in Tenda G103 1.0.0.5. The impacted element is the function action_set_net_settings of the file gpon.lua of the component Setting Handler. Performing a manipulation of the argument authLoid/authLoidPassword/authPassword/authSerialNo/authType/oltType/usVlanId/usVlanPriority results in command injection. It is possible to initiate the attack remotely. The exploit is now public and may be used.
A command injection vulnerability has been identified in the Tenda G103 GPON optical network terminal, specifically in the 1.0.0.5 firmware version. The issue arises in the 'action_set_net_settings' function within the 'gpon.lua' file, where several parameters, including 'authLoid', 'authLoidPassword', 'authPassword', 'authSerialNo', 'authType', 'oltType', 'usVlanId', and 'usVlanPriority', are improperly sanitized. This lack of validation allows authenticated attackers to inject arbitrary commands, which are executed with root privileges, potentially leading to a complete takeover of the device. The vulnerability can be exploited remotely, and a public exploit is available.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 2, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/ZZ2266/.github.io/tree/main/Tenda%20G103/authLoid | [email protected] | ExploitThird Party Advisory |
| https://vuldb.com/submit/781132 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/submit/781133 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/submit/781134 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/submit/781135 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/submit/781142 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/submit/781143 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/submit/781144 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/submit/781145 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/vuln/354670 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/vuln/354670/cti | [email protected] | Permissions RequiredVDB Entry |
| https://www.tenda.com.cn/ | [email protected] | Product |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-77 | Improper Neutralization of Special Elements used in a Command ('Command Injection') | [email protected] |
| CWE-74 | Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') | [email protected] |
| CWE-77 | Improper Neutralization of Special Elements used in a Command ('Command Injection') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| tenda g103 firmware | 1.0.0.5 |
CPE
Remediation
| |
| tenda g103 | All versions |
CPE
Remediation
| |
Change History
6 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 24, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 29, 2026 | Data Remediation | [email protected] |
| Apr 6, 2026 | Initial Analysis | [email protected] |
| Apr 2, 2026 | New CVE Received | [email protected] |