CVE-2018-14558

CRITICAL
9.8
CVSS Score
Published: October 30, 2018 at 06:00 PM UTC
Updated: June 17, 2026 at 01:41 AM UTC
6 products affected across 1 vendorAC10 FirmwareAC9 FirmwareAC7 Firmware

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Severity
CRITICAL9.8
Exploitation
CISA KEV
Exploit prediction
EPSS 9%
SSVC
Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score8.5%

EPSS (Exploit Prediction Scoring System) estimates a 8.5% chance this CVE is exploited in the wild within the next 30 days — higher than 95% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

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.

Required Action
Apply updates per vendor instructions.
Ransomware Use
Unknown
Added to KEV
Nov 3, 2021
Remediation Due
May 3, 2022
1638 days overdue

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v ≤ 15.03.06.23_cn
v ≤ 15.03.06.44_cn
v ≤ 15.03.05.19(6318)_cn
80%
All versions
80%
All versions
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

x_refsource_MISCBroken LinkExploitThird Party Advisory
https://github.com/zsjevilhex/iot/blob/master/route/tenda/tenda-01/Tenda.md
US Government Resource
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-14558

SSVC — Action Prioritization

SSVCActiveAutomatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

9.8CRITICALCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-78

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