Is CVE-2018-20334 actively exploited?

No active exploitation of CVE-2018-20334 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2018-20334 be exploited remotely?

Yes. CVE-2018-20334 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2018-20334?

CVE-2018-20334 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2018-20334

CRITICAL

CVE-2018-20334

CWE-78Published: March 20, 2020· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

An issue was discovered in ASUSWRT 3.0.0.4.384.20308. When processing the /start_apply.htm POST data, there is a command injection issue via shell metacharacters in the fb_email parameter. By using this issue, an attacker can control the router and get shell.

NVD Source

Technical Analysis

CVE-2018-20334 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.