CVE-2018-14558: Tenda AC7, AC9, and AC10 Routers Command Injection Vulnerability

Vulnerability summary

CVE-2018-14558 is a high (CVSS 10.0) OS Command Injection vulnerability in Tenda AC7, AC9, and AC10 Routers. It is known to be exploited: CISA lists it, first on 03-11-2021. EPSS estimates a 8.51% chance of exploitation in the next 30 days, higher than 95% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 30-10-2018
   PublishedVulnerability first disclosed.
2. 03-11-2021
   Added to CISA KEVTenda AC7, AC9, and AC10 Routers Command Injection Vulnerability
3. 03-05-2022
   CISA remediation dueApply updates per vendor instructions.
4. 21-10-2025
   Last modifiedVulnerability information updated.

Description

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.

• CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.