What’s Vulnerable › Vulnerabilities

CVE-2020-11581

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 9.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-04-06 · updated 2026-06-17
• Weakness: CWE-78

Description

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

• Ivanti Connect Secure (Pulse Secure): through 2020-04-06
• Pulsesecure Pulse Policy Secure: all versions

References

• https://git.lsd.cat/g/pulse-host-checker-rce
• https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44426
• https://git.lsd.cat/g/pulse-host-checker-rce
• https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44426

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