Threats / Tenda / CVE-2018-14558
CVE-2018-14558
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
Tenda AC7, AC9, and AC10 Routers vulnerability
Tenda AC7, AC9, and AC10 routers contain a command injection vulnerability in the formsetUsbUnload function that allows unauthenticated attackers to execute arbitrary OS commands through crafted requests.
Verdict
Today item — known-exploited.
A command injection flaw in Tenda routers enables remote code execution via the setUsbUnload endpoint. The vulnerability has been exploited in the wild and carries a high EPSS score of 0.78, indicating significant real-world attack likelihood.
01
Is it exploitable?
— the evidence, ranked above the scoreReported exploitation
396 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03).
Probability (EPSS)
EPSS 0.08672 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
Affected: Tenda, AC7, AC9, and AC10 Routers. Confirm exact fixed builds in the vendor advisory.
Weakness (CWE)
Mapped to CWE-78 OS Command Injection — weakness family: Injection.CWE assignment from the public NVD record; the weakness class drives how the flaw is exploited.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I craft a malicious goform/setUsbUnload HTTP request containing shell metacharacters to inject OS commands.
Business
Attacker gains unauthenticated remote code execution on the router with device-level privileges.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I execute commands to establish persistence, exfiltrate network traffic, or pivot to internal systems.
Business
Router becomes a compromised network access point, exposing all connected devices and data to interception or manipulation.
3
Lateral reach — past segmentation narrative 3
Attacker
I modify router configurations or deploy malware to intercept DNS queries or redirect traffic.
Business
Organization loses network integrity and customer trust; potential regulatory compliance violations and incident response costs.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05