CVE-2018-14558VulnerabilityPublished 11/03/2021Updated 10/24/2026

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

Affects Tenda AC7, AC9, and AC10 RoutersSource CISA KEV

Severity

High

No CVSS score published yet

Exploitation: Actively exploited – in CISA KEV since 11/03/2021
KEV deadline: 05/03/2022
EPSS: 8.5% chance of exploitation in 30 days – higher than 95% of CVEs

What to do

CISA required action

Apply updates per vendor instructions.

nvd.nist.gov/vuln/detail/CVE-2018-14558 (opens in a new tab)

Description

Tenda AC7, AC9, and AC10 routers have a command injection vulnerability in the formsetUsbUnload function, which executes OS commands with untrusted input. This flaw allows attackers to execute arbitrary operating system commands via a crafted goform/setUsbUnload request. The vulnerability has been exploited in the wild. No specific affected versions or patch information is provided.

Summary

The Tenda AC7, AC9, and AC10 routers contain a command injection vulnerability (CWE-78) due to the formsetUsbUnload function invoking a dosystemCmd function with untrusted input. An attacker can exploit this by sending a specially crafted goform/setUsbUnload request, resulting in arbitrary OS command execution on the device. This vulnerability has been observed to be exploited in the wild, indicating active threat usage. No vendor advisory or patch information is available in the provided data.

Impact

Successful exploitation allows remote attackers to execute arbitrary operating system commands on affected Tenda routers, potentially leading to full device compromise. This can result in unauthorized control, data theft, or disruption of network services. The vulnerability is known to be exploited in the wild, increasing the risk to affected devices.

Mitigation

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the device management interface from untrusted networks and monitor for suspicious activity related to the goform/setUsbUnload endpoint.

Weaknesses

CWE-78OS Command Injection (opens in a new tab)

What to do

Description

AnalysisAI-generated, updated 10/24/2026, 08:55:12 UTC

Weaknesses

References

Related threats