CVE-2018-14558
Tenda AC7, AC9, and AC10 Routers Command Injection Vulnerability
Published Oct 30, 2018 · corrected/updated Jun 16, 2026 · tenda ac7 firmware · evidence confidence very high
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.
Grounded briefings
Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.
Executive
CVE-2018-14558 is a critical public vulnerability record for tenda ac7 firmware. CISA lists it as known exploited. Published remediation guidance: Apply updates per vendor instructions. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.
System administrator
Identify whether tenda ac7 firmware is in your estate, then compare installed versions with the affected ranges. Affected packages or ranges on record: tenda/ac10 firmware; tenda/ac7 firmware; tenda/ac9 firmware; Tenda AC7, AC9, and AC10 Routers. Published remediation guidance: Apply updates per vendor instructions. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.
Security analyst
Signals on file: CVSS 9.8, EPSS 8.5%. CISA lists it as known exploited. Weakness classes: CWE-78. Sources contributing to this record: cisa_kev, cve_org, epss, nvd. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.
Exploitation and remediation
Exploitation evidence
Confirmed in CISA KEV since Nov 3, 2021. Listed in the CISA Known Exploited Vulnerabilities catalog.
Patch and remediation
Apply updates per vendor instructions. CISA due date May 3, 2022.
Safe detection guidance
Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.
Code
The project this record applies to. Exploit listings stay in References.
Timeline
Detection, updates, and resolution for this record.
Oct 30, 2018 · Catalog
Detected
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
Nov 3, 2021 · CISA KEV
Known exploited
Apply updates per vendor instructions.
May 3, 2022 · CISA KEV
Remediation due
Apply updates per vendor instructions.
Jun 16, 2026 · Catalog
Updated
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
Affected
- cpe tenda/ac10 firmwareversion unspecified
- cpe tenda/ac7 firmwareversion unspecified
- cpe tenda/ac9 firmwareversion unspecified
- vendor Tenda AC7, AC9, and AC10 Routersversion unspecified
Sources
- CISA KEVConfirmed exploitationCVE-2018-14558
Tenda AC7, AC9, and AC10 devices contain a command injection vulnerability due to the "formsetUsbUnload" function executes a dosystemCmd function with untrusted input. Successful exploitation allows an attacker to execute OS commands via a crafted goform/setUsbUnload request.
cisa.gov - CVE.orgVulnerability recordCVE-2018-14558
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2018-14558
30-day exploitation probability 8.5%
first.org - NIST NVDVulnerability recordCVE-2018-14558
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 arbit
nvd.nist.gov