CVE-2018-14558

Name: CVE-2018-14558
Creator: NVD / NIST
Published: 2018-10-30T18:29:00.58+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10Actively ExploitedEPSS 8.67%

Last modified Jun 17, 2026

CVE-2018-14558 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. CISA has confirmed active exploitation in the wild. EPSS estimates a 8.67% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

8.67%

94.4th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by May 3, 2022.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Tenda	Ac7 Firmware	<= 15.03.06.44_cn
Tenda	Ac9 Firmware	<= 15.03.05.19\(6318\)_cn
Tenda	Ac10 Firmware	<= 15.03.06.23_cn

References

https://github.com/zsjevilhex/iot/blob/master/route/tenda/tenda-01/Tenda.mdBroken Link, Exploit, Third Party Advisory
https://github.com/zsjevilhex/iot/blob/master/route/tenda/tenda-01/Tenda.mdBroken Link, Exploit, Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-14558US Government Resource

Timeline

Published: Oct 30, 2018
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2018-14558?

How severe is CVE-2018-14558?

CVE-2018-14558 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 8.67% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2018-14558?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-14558?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST