CVE-2020-11581: Pulse Secure Pulse Connect Secure

High severity, CVSS 8.1. EPSS: 9.8% chance of exploitation in the next 30 days.

An issue was discovered in Pulse Secure Pulse Connect Secure (PCS) through 2020-04-06. The applet in tncc.jar, executed on macOS, Linux, and Solaris clients when a Host Checker policy is enforced, allows a man-in-the-middle attacker to perform OS command injection attacks (against a client) via shell metacharacters to the doCustomRemediateInstructions method, because Runtime.getRuntime().exec() is used.

Affected products

• Pulse Secure Pulse Connect Secure: up to and including 2020-04-06
• Pulse Secure Pulse Policy Secure: affected versions not specified

Published 2020-04-06. Last modified 2026-06-17.