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(631…

published 2018-10-30 8y ago modified 2026-06-17 4mo ago also EUVD-2018-6467

cvss: 9.8; version 3.1, CNA
cisa kev: Exploited; added 2021-11-03
epss: 8.5%; EPSS 8.5% chance of exploitation in 30 days, percentile 95%
public exploits: 0; none known

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.

Patch / fix

cisa required action Apply updates per vendor instructions.

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Timeline

2018-10-30 Published
2021-11-03 Added to CISA KEV
2022-05-03 CISA patch deadline
2025-02-04 CISA SSVC: exploitation active

Known exploited

Added: 5y ago (2021-11-03)
Patch by: 2022-05-03 (4y ago)
Ransomware: Not known
Required action: Apply updates per vendor instructions.
Vendor, product: Tenda, AC7, AC9, and AC10 Routers
CISA name: Tenda AC7, AC9, and AC10 Routers Command Injection Vulnerability

CISA SSVC

Exploitation: Active, exploited in the wild
Automatable: yes
Technical impact: total
Assessed: last yr. (2025-02-04)

Exploit prediction

8.51% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

github.com https://github.com/zsjevilhex/iot/blob/master/route/tenda/tenda-01/Tenda.md referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	10.0	AV:N/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness

CWE-78 Improper Neutralization of Special Elements used in an OS Command

References

github.com /zsjevilhex/iot/blob/master/route/tenda/tenda-01/Tenda.md
broken-link, exploit, third-party-advisory
cisa.gov /known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-14558
government-resource, us-government-resource

Sources

CVE List CVE-2018-14558
NVD CVE-2018-14558

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