CVE-2026-5338

G103 Firmware vulnerability

CVSS

4.7

EPSS

4.4%

EPSS pct

90th

Exploited

No known

A security vulnerability has been detected in Tenda G103 1.0.0.5. The affected element is the function action_set_system_settings of the file system.lua of the component Setting Handler. Such manipulation of the argument lanIp leads to command injection. The attack may be performed from remote. The exploit has been disclosed publicly and may be used.

Affected vendor

Tenda

Affected product

G103 Firmware

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

Weakness type (CWE)

CWE-74 — Injection
CWE-77 — Command Injection

Published

2026-04-02

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring high privileges, no user interaction. Successful exploitation leads to low impact to confidentiality, low impact to integrity, low impact to availability.

Its EPSS score of 4.4% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 90% of all scored CVEs.

Check your external exposure to CVE-2026-5338

Confirm whether Tenda G103 Firmware is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2026-5338.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2026-5338

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