Is CVE-2018-20812 actively exploited?

No active exploitation of CVE-2018-20812 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2018-20812 be exploited remotely?

Yes. CVE-2018-20812 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2018-20812?

CVE-2018-20812 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2018-20812

HIGH

CVE-2018-20812

CWE-200Published: June 28, 2019· Updated: Jun 17, 2026

7.5

CVSS v3.1

Official Description

An information exposure issue where IPv6 DNS traffic would be sent outside of the VPN tunnel (when Traffic Enforcement was enabled) exists in Pulse Secure Pulse Secure Desktop 9.0R1 and below. This is applicable only to dual-stack (IPv4/IPv6) endpoints.

NVD Source

Technical Analysis

CVE-2018-20812 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), with a CVSS base score of 7.5.

From a weakness classification perspective (CWE-200): Information exposure vulnerabilities leak sensitive data to unauthorized actors.