What is CVE-2018-20810?

CVE-2018-20810 is a critical-severity vulnerability in Ivanti Connect Secure, classified under Inadequate Encryption Strength. CVSS score: 9.8/10. Published 2019-06-28.

How severe is CVE-2018-20810?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Ivanti Connect Secure

CVE-2018-20810

Session data between cluster nodes during cluster synchronization is not properly encrypted in Pulse Secure Pulse Connect Secure (PCS) 8.3RX before 8.3R2 and Pulse Policy Secure (PPS) 5.4RX before 5.4R2. This is not applicable to PCS 8.1RX, PPS 5.2RX, or stand-alone devices.

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

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.018 (77.3th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 77.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000

Affected products

Ivanti Connect Secure — versions 8.3
Pulsesecure Pulse Policy Secure — versions 5.4

Weakness classification (CWE)

CWE-326 — Inadequate Encryption Strength

References

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

Frequently asked questions

What is CVE-2018-20810?: CVE-2018-20810 is a critical-severity vulnerability in Ivanti Connect Secure, classified under Inadequate Encryption Strength. CVSS score: 9.8/10. Published 2019-06-28.
How severe is CVE-2018-20810?: Critical severity. CVSS v3 base score is 9.8 out of 10.