What is CVE-2018-20812?

CVE-2018-20812 is a high-severity vulnerability in Pulsesecure Pulse Secure Desktop Client, classified under Information Disclosure. CVSS score: 7.5/10. Published 2019-06-28.

How severe is CVE-2018-20812?

High severity. CVSS v3 base score is 7.5 out of 10.

Information disclosure in Pulsesecure Pulse Secure Desktop Client

CVE-2018-20812

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.

Vulnerability class: Information Disclosure

Published 2019-06-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.011 (64.6th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 64.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Pulsesecure Pulse Secure Desktop Client — versions 4.0, 5.1, 5.1r

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA43877/ (Vendor Advisory)

Frequently asked questions

What is CVE-2018-20812?: CVE-2018-20812 is a high-severity vulnerability in Pulsesecure Pulse Secure Desktop Client, classified under Information Disclosure. CVSS score: 7.5/10. Published 2019-06-28.
How severe is CVE-2018-20812?: High severity. CVSS v3 base score is 7.5 out of 10.