Is CVE-2018-20799 actively exploited?

No active exploitation of CVE-2018-20799 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2018-20799 be exploited remotely?

Yes. CVE-2018-20799 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2018-20799?

CVE-2018-20799 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2018-20799

HIGH

CVE-2018-20799

NVD-CWE-noinfoPublished: March 1, 2019· Updated: Jun 17, 2026

7.5

CVSS v3.1

Official Description

In pfSense 2.4.4_1, blocking of source IP addresses on the basis of failed HTTPS authentication is inconsistent with blocking of source IP addresses on the basis of failed SSH authentication (the behavior does not match the sshguard documentation), which might make it easier for attackers to bypass intended access restrictions.

NVD Source

Technical Analysis

CVE-2018-20799 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.