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Vulnerabilities

Vulnerability · CVE-2026-5339

A vulnerability was detected in Tenda G103 1.0.0.5.

Published Apr 2, 2026 · catalog updated Jul 24, 2026 · g103 firmware

Check this week

CVE-2026-5339 is not in CISA KEV. FIRST estimates a 10.21% chance of exploitation in the next 30 days. Check whether you run g103 firmware.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Low2.0
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
10.21%
Remediation
Advisory link
Affected products
cpe 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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe tenda/g103 firmware1.0.0.5

How to fix CVE-2026-5339

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2026-5339 is not in CISA KEV. FIRST estimates a 10.21% chance of exploitation in the next 30 days. Check whether you run g103 firmware.

Which versions are affected?

Compare what you have installed with tenda/g103 firmware 1.0.0.5. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-74: Injection; CWE-77: Command Injection. EPSS 10.21%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 2, 2026 · NIST NVD

    Detected

    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

  2. Jul 24, 2026 · NIST NVD

    Updated

    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

Sources

  • CVE.orgVulnerability recordCVE-2026-5339

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-5339

    30-day exploitation probability 10.2%

    first.org
  • NIST NVDVulnerability recordCVE-2026-5339

    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/u

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.