Read the docs
TI-2026-04671 Aliases CVE-2026-5339GHSA-7g3h-f8vq-89vv

Tenda G103 Setting gpon.lua action_set_net_settings command injection

Priority MEDIUM 56CWE-74Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
Low · Low · Low
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-77.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.06496 93rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
TendaG1031.0.0.5—No fix listedCNA
  • G103 VendorTenda Affected 1.0.0.5 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:tenda:g103_firmware:1.0.0.5:*:*:*:*:*:*:*1.0.0.5VulnerableTenda
cpe:2.3:h:tenda:g103:-:*:*:*:*:*:*:*not specified by NVDRunning onTenda
  • cpe:2.3:o:tenda:g103_firmware:1.0.0.5:*:*:*:*:*:*:* Versions 1.0.0.5 Vulnerable ·Tenda
  • cpe:2.3:h:tenda:g103:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Tenda

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-5339
  2. 2026-10-03 Alias added: GHSA-7g3h-f8vq-89vv
  3. 2026-10-25 EPSS moved to the 90th–95th percentile

References

Exploit 1

Other 1

  • TI-2023-11905 Command injection vulnerability found in Tenda G103 v.1.0.0.5 allows attacker to execute… CVSS 3.1CRITICAL 9.8
  • TI-2026-04670 Tenda G103 Setting system.lua action_set_system_settings command injection CVSS 4.0MEDIUM 5.1
  • TI-2023-16565 There is a command injection vulnerability in the Tenda G103 Gigabit GPON Terminal with… CVSS 3.1HIGH 8.8
  • TI-2023-11908 Command Injection vulnerability found in Tenda G103 v.1.0.05 allows an attacker to obtain… CVSS 3.1HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences