CVE-2018-14558
CriticalExploitedPublic exploitAn 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).
Published Oct 30, 2018 · Updated Nov 7, 2025
Key Facts
Patch immediately- CVE-2018-14558 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Ac10 Firmware (Tenda), Ac7 Firmware (Tenda), Ac9 Firmware (Tenda).
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Apr 13, 2021. Public exploit code is available.
- EPSS estimates a 8.5% probability of exploitation in the next 30 days.
- Fixed versions are available, including Ac10 Firmware <=15.03.06.23_cn, Ac7 Firmware <=15.03.06.44_cn, Ac9 Firmware <=15.03.05.19\(6318\)_cn.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
8.5%
Higher than 94.9% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2018-14558 brief as a PDF
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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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Nov 3, 2021 | May 3, 2022 | Not reported |
| Industry KEV feed | Apr 13, 2021 | May 3, 2022 | Not reported |
| CIRCL KEV | Nov 3, 2021 | May 3, 2022 | Not reported |
| ENISA EUVD | Nov 3, 2021 | n/a | Not reported |
Required action: Apply updates per vendor instructions.
Affected Products
3 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Ac10 FirmwareTenda | See advisory | 15.03.06.23_cn |
| Ac7 FirmwareTenda | See advisory | 15.03.06.44_cn |
| Ac9 FirmwareTenda | See advisory | 15.03.05.19\(6318\)_cn |
Patched Releases
Ac10 Firmware
<=15.03.06.23_cn
Ac7 Firmware
<=15.03.06.44_cn
Ac9 Firmware
<=15.03.05.19\(6318\)_cn
Timeline
Publicly disclosed
Oct 30, 2018
Added to Industry KEV feed
Apr 13, 2021
Added to CISA KEV
Nov 3, 2021
Added to CIRCL KEV
Nov 3, 2021
Added to ENISA EUVD
Nov 3, 2021
Last updated
Nov 7, 2025
Weakness Type
- CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
References
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
FAQ
Common Questions.
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).
Affected: Ac10 Firmware (Tenda); Ac7 Firmware (Tenda); Ac9 Firmware (Tenda). The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Apr 13, 2021.
Yes. It was added on Nov 3, 2021 with a federal remediation due date of May 3, 2022.
Public exploit code is available.
Fixed versions are available, including Ac10 Firmware <=15.03.06.23_cn, Ac7 Firmware <=15.03.06.44_cn, Ac9 Firmware <=15.03.05.19\(6318\)_cn.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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