CVE-2026-5339

Tenda G103 Setting gpon.lua action_set_net_settings command injection

HIGH
8.8
CVSS Score
Published: April 2, 2026 at 02:15 PM UTC
Updated: July 24, 2026 at 09:20 PM UTC
2 products affected across 1 vendorG103 FirmwareG103

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Severity
HIGH8.8
Exploit prediction
EPSS 6%
SSVC
PoC

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

tenda-g103 (same device)
80%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (12)

VDB EntryTechnical DescriptionThird Party Advisory
Source: cverecord
https://vuldb.com/vuln/354670
SignaturePermissions RequiredVDB Entry
Source: cverecord
https://vuldb.com/vuln/354670/cti
Third Party AdvisoryVDB Entry
Source: cverecord
https://vuldb.com/submit/781132
Third Party AdvisoryVDB Entry
Source: cverecord
https://vuldb.com/submit/781133
Third Party AdvisoryVDB Entry
Source: cverecord
https://vuldb.com/submit/781134
Third Party AdvisoryVDB Entry
Source: cverecord
https://vuldb.com/submit/781135
Third Party AdvisoryVDB Entry
Source: cverecord
https://vuldb.com/submit/781142
Third Party AdvisoryVDB Entry
Source: cverecord
https://vuldb.com/submit/781143

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-77CWE-74

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