Is CVE-2018-20809 being actively exploited?

CVE-2018-20809 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2018-20809?

CVE-2018-20809 has a CVSS 3.0 base score of 7.5 (HIGH).

CVE-2018-20809

HIGH · CVSS 7.5EPSS 2.7%EU EUVD

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.

Key facts

CVSS score: 7.5 (v3.0)
Severity: HIGH
CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-20
EPSS score: 2.7% (86th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2018-13351)
Published: June 28, 2019
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2018-13351 in the EU Vulnerability Database. Last updated in EUVD on September 16, 2024.

View on the EU Vulnerability Database

Affected products

ivanti / connect secure
ivanti / connect secure
ivanti / connect secure
ivanti / connect secure
ivanti / connect secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure
pulsesecure / pulse policy secure

and 46 more…

Certified products that may be affected

3 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Pulse Connect Secure 8.2 on Virtual Appliance and Pulse Policy Secure 5.3 on Virtual Appliance - Pulse Secure, LLC - Common Criteria CCEVS-VR-VID-10829-2018 - archived
Pulse Policy Secure v5.3 - Pulse Secure, LLC - Common Criteria CCEVS-VR-VID-10785-2017 - archived
Pulse Policy Secure 5.0 R13 - Pulse Secure, LLC - Common Criteria Certificate Number: 2016/98 - archived

References

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

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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