How severe is CVE-2018-14558?

CVE-2018-14558 has a CVSS score of 9.8/10, rated CRITICAL. Immediate patching is strongly recommended.

Which packages are affected by CVE-2018-14558?

Affected package information for CVE-2018-14558 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2018-14558?

No fixed version has been published for CVE-2018-14558 yet. Monitor the advisory for updates, apply mitigations recommended by the vendor, and use O3 Security to track when a fix becomes available in your stack.

Is CVE-2018-14558 actively exploited in the wild?

Yes. There are 2 known exploit references for CVE-2018-14558, including 2 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2018-14558?

CVE-2018-14558 has an EPSS (Exploit Prediction Scoring System) score of 78.3%, placing it in the 99th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

Is CVE-2018-14558 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2018-14558 (Tenda AC7, AC9, and AC10 Routers Command Injection Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2021-11-03. CISA required all US federal civilian agencies to remediate this vulnerability by 2022-05-03. The required action was: Apply updates per vendor instructions. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

What type of vulnerability is CVE-2018-14558?

CVE-2018-14558 is classified as OS Command Injection (CWE-78). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

Which products and versions are affected by CVE-2018-14558?

CVE-2018-14558 affects tenda ac7 firmware; tenda ac9 firmware; tenda ac10 firmware. Check the affected-products list on this page against your deployed version to confirm exposure.

When was CVE-2018-14558 published, and has it been updated?

CVE-2018-14558 was published on October 30, 2018 and was last updated on November 7, 2025. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CISA KEV·Added 2021-11-03 — agencies required to remediate by 2022-05-03

CVE-2018-14558

CRITICAL

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…

Published

Oct 30, 2018

Updated

Nov 7, 2025

Affected

0 pkgs

Patched

None yet

Exploits

2 known

EPSS Exploitation Probability

via FIRST.org ↗

78.3%probability of exploitation in next 30 days

Very High Risk99th percentile0.00%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

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.

Affected Products

3 products · 3 configurations

ac7 firmwaretenda

≤ 15.03.06.44_cn

range

ac9 firmwaretenda

≤ 15.03.05.19\(6318\)_cn

range

ac10 firmwaretenda

≤ 15.03.06.23_cn

range

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

An issue was discovered on Tenda AC7 devices with firmware through V15.0…

github.comNVDOct 2019

An issue was discovered on Tenda AC7 devices with firmware through V15.0…

cisa.govCISAJul 2021

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2018-14558 in your stack?

O3 detects CVE-2018-14558 across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

Scan my stack How O3 SCA works