---
id: "CVE-2018-14558"
kind: "vulnerability"
aliases: ["CVE-2018-14558"]
title: "Tenda AC7, AC9, and AC10 Routers: Tenda AC7, AC9, and AC10 Routers Command Injection Vulnerability"
severity: "critical"
cvss: 10.0
epss: 0.0851
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "Tenda AC7, AC9, and AC10 Routers", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["exploited", "home-network", "infrastructure", "routers", "self-hosted", "tenda"]
not_affected_if: ["firmware-newer-than-affected", "other-tenda-models", "remote-admin-disabled"]
published_at: "2018-10-30T18:29:00+00:00"
first_seen_at: "2026-10-23T19:11:53+00:00"
updated_at: "2026-10-23T20:29:30+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2018-14558", "first_seen_at": "2026-10-23T19:11:53+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2018-14558", "first_seen_at": "2026-10-23T19:13:44+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-14558", "first_seen_at": "2026-10-23T19:35:23+00:00"}]
---

# Tenda AC7, AC9, and AC10 Routers: Tenda AC7, AC9, and AC10 Routers Command Injection Vulnerability

Tenda AC7, AC9 and AC10 routers running older firmware have a command injection flaw in the goform/setUsbUnload handler. An attacker who can send a crafted request to the router can run arbitrary OS commands on it.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Tenda AC7, AC9, and AC10 Routers affected ? fixed ?

## How to check

Log into the router admin UI and read the firmware version; compare it to the affected builds (AC7 through V15.03.06.44_CN, AC9 through V15.03.05.19(6318)_CN, AC10 through V15.03.06.23_CN).

## Fix

Update the router to a firmware build newer than the affected versions listed in the NVD entry; if none is available, unknown.
Disable remote administration and keep the admin interface off the internet.

## Timeline

- 2026-10-23T19:11:53+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2018-14558
- 2026-10-23T19:13:44+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2018-14558
- 2026-10-23T19:35:23+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2018-14558

## From the sources

An issue was discovered on Tenda AC7 devices with firmware through V15.03.06.44_CN(AC7), AC9 devices with firmware through V15.03.05.19(6318)_CN(AC9), and AC10 devices with firmware through V15.03.06.23_CN(AC10). A command Injection vulnerability allows attackers to execute arbitrary OS commands via a crafted goform/setUsbUnload request. This occurs because the "formsetUsbUnload" function executes a dosystemCmd function with untrusted input.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_