RCE in Tenda G103
CVE-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/usVlanId/usVlanPriority results in command injection. It is possible to initiate the attack remotely. The exploit is now public and may be used.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.102 (95.5th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 95.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.063 · newest: 0.102 · change: +0.039
Affected products
- Tenda G103 — versions 1.0.0.5
- Tenda G103 Firmware — versions 1.0.0.5
Weakness classification (CWE)
References
- vuldb.com/vuln/354670 (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/vuln/354670/cti (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/submit/781132 (VDB Entry, Third Party Advisory, third-party-advisory)
- vuldb.com/submit/781133 (VDB Entry, Third Party Advisory, third-party-advisory)
- vuldb.com/submit/781134 (VDB Entry, Third Party Advisory, third-party-advisory)
- vuldb.com/submit/781135 (VDB Entry, Third Party Advisory, third-party-advisory)
- vuldb.com/submit/781142 (VDB Entry, Third Party Advisory, third-party-advisory)
- vuldb.com/submit/781143 (VDB Entry, Third Party Advisory, third-party-advisory)
- vuldb.com/submit/781144 (VDB Entry, Third Party Advisory, third-party-advisory)
- vuldb.com/submit/781145 (VDB Entry, Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-5339?
- CVE-2026-5339 is a medium-severity vulnerability in Tenda G103, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 4.7/10. Published 2026-04-02.
- How severe is CVE-2026-5339?
- Medium severity. CVSS v3 base score is 4.7 out of 10.