Is CVE-2018-4030 actively exploited?

No active exploitation of CVE-2018-4030 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2018-4030 be exploited remotely?

Yes. CVE-2018-4030 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2018-4030?

CVE-2018-4030 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2018-4030

HIGH

CVE-2018-4030

CWE-444Published: March 21, 2019· Updated: Jun 17, 2026

7.5

CVSS v3.1

Official Description

An exploitable vulnerability exists the safe browsing function of the CUJO Smart Firewall, version 7003. The bug lies in the way the safe browsing function parses HTTP requests. The "Host" header is incorrectly extracted from captured HTTP requests, which would allow an attacker to visit any malicious websites and bypass the firewall. An attacker could send an HTTP request to exploit this vulnerability.

NVD Source

Technical Analysis

CVE-2018-4030 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 full integrity compromise (data manipulation), with a CVSS base score of 7.5.