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Vulnerability record · CVE-2026-5339 · published 2 April 2026

CVE-2026-5339: Tenda g103 firmware injection vulnerability

Tenda · G103 Firmware

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.

2.0 CVSS 4.0 Low EPSS 10% · top 4.5% CWE-74 · InjectionCWE-77 · Command injection
2.0CVSS 4.0 base score, v2 5.8
10%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
12References, 1 tagged exploit
24 Jul 2026Last modified by NVD

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/ZZ2266/.github.io/tree/main/Tenda%20G103/authLoid ExploitThird Party Advisory
https://vuldb.com/submit/781132 Third Party AdvisoryVDB Entry
https://vuldb.com/submit/781133 Third Party AdvisoryVDB Entry
https://vuldb.com/submit/781134 Third Party AdvisoryVDB Entry
https://vuldb.com/submit/781135 Third Party AdvisoryVDB Entry
https://vuldb.com/submit/781142 Third Party AdvisoryVDB Entry
https://vuldb.com/submit/781143 Third Party AdvisoryVDB Entry
https://vuldb.com/submit/781144 Third Party AdvisoryVDB Entry
https://vuldb.com/submit/781145 Third Party AdvisoryVDB Entry
https://vuldb.com/vuln/354670 Third Party AdvisoryVDB Entry
https://vuldb.com/vuln/354670/cti Permissions RequiredVDB Entry
https://www.tenda.com.cn/ Product

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-5339), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.