What’s Vulnerable › Vulnerabilities

CVE-2020-11582

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-04-06 · updated 2026-06-17
• Weakness: CWE-668

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, launches a TCP server that accepts local connections on a random port. This can be reached by local HTTP clients, because up to 25 invalid lines are ignored, and because DNS rebinding can occur. (This server accepts, for example, a setcookie command that might be relevant to CVE-2020-11581 exploitation.)

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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