What is CVE-2018-14558?

CVE-2018-14558 is a critical-severity vulnerability in Tenda Ac10, classified under OS Command Injection. CVSS score: 9.8/10. Published 2018-10-30.

How severe is CVE-2018-14558?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2018-14558 known to be exploited?

Yes. CVE-2018-14558 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 3 public proof-of-concept repositories are indexed.

RCE in Tenda Ac10

CVE-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 arbitrary OS commands via a crafted goform/setUsbUnload request. This occurs because the "formsetUsbUnload" function executes a dosystemCmd function with untrusted input.

Vulnerability class: Command Injection (OS Command Injection)

Published 2018-10-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.085 (95.0th percentile), scored 2026-10-19.

Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 95.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.087 · newest: 0.085 · change: -0.002

Affected products

Weakness classification (CWE)

CWE-78 — OS Command Injection

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2021-11-03. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-05-03.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

github.com/zsjevilhex/iot/blob/master/route/tenda/tenda-01/Tenda.md (Exploit, Third Party Advisory, Broken Link)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2018-14558?: CVE-2018-14558 is a critical-severity vulnerability in Tenda Ac10, classified under OS Command Injection. CVSS score: 9.8/10. Published 2018-10-30.
How severe is CVE-2018-14558?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2018-14558 known to be exploited?: Yes. CVE-2018-14558 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 3 public proof-of-concept repositories are indexed.