Is CVE-2018-3963 actively exploited?

No active exploitation of CVE-2018-3963 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2018-3963 be exploited remotely?

Partially. CVE-2018-3963 requires adjacent network access (same network segment) to exploit.

What is the CVSS score of CVE-2018-3963?

CVE-2018-3963 has a CVSS score of 8.0 (HIGH).

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HIGH

CVE-2018-3963

CWE-77Published: March 21, 2019· Updated: Jun 17, 2026

8.0

CVSS v3.1

Official Description

An exploitable command injection vulnerability exists in the DHCP daemon configuration of the CUJO Smart Firewall. When adding a new static DHCP address, its corresponding hostname is inserted into the dhcpd.conf file without prior sanitization, allowing for arbitrary execution of system commands. To trigger this vulnerability, an attacker can send a DHCP request message and set up the corresponding static DHCP entry.

NVD Source

Technical Analysis

CVE-2018-3963 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

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 8.0.