CVE-2026-5339: Tenda G103 Setting gpon.lua action_set_net_settings command injection

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 6.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-04-02 · updated 2026-07-24
Weakness: CWE-74

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.

Affected products

Tenda G103: 1.0.0.5

References

https://github.com/ZZ2266/.github.io/tree/main/Tenda%20G103/authLoid
https://vuldb.com/submit/781132
https://vuldb.com/submit/781133
https://vuldb.com/submit/781134
https://vuldb.com/submit/781135
https://vuldb.com/submit/781142
https://vuldb.com/submit/781143
https://vuldb.com/submit/781144
https://vuldb.com/submit/781145
https://vuldb.com/vuln/354670
https://vuldb.com/vuln/354670/cti
https://www.tenda.com.cn/

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