CVE-2018-20809: Ivanti Connect Secure

High severity, CVSS 7.5. EPSS: 2.7% chance of exploitation in the next 30 days.

A crafted message can cause the web server to crash with Pulse Secure Pulse Connect Secure (PCS) 8.3RX before 8.3R5 and Pulse Policy Secure 5.4RX before 5.4R5. This is not applicable to PCS 8.1RX.

Affected products

• Ivanti Connect Secure: version 8.3 only
• Pulse Secure Pulse Policy Secure: version 4.4 only; version 5.0 only; version 5.1 only; version 5.2 only; version 5.3 only; version 5.4 only

Published 2019-06-28. Last modified 2026-06-17.