CVE-2019-11540

Name: CVE-2019-11540
Creator: NVD / NIST
Published: 2019-04-26T02:29:00.36+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 8.26%

Last modified Jun 17, 2026

CVE-2019-11540 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. In Pulse Secure Pulse Connect Secure version 9.0RX before 9.0R3.4 and 8.3RX before 8.3R7.1 and Pulse Policy Secure version 9.0RX before 9.0R3.2 and 5.4RX before 5.4R7.1, an unauthenticated, remote attacker can conduct a session hijacking attack.. EPSS estimates a 8.26% chance of exploitation in the next 30 days.

Description

In Pulse Secure Pulse Connect Secure version 9.0RX before 9.0R3.4 and 8.3RX before 8.3R7.1 and Pulse Policy Secure version 9.0RX before 9.0R3.2 and 5.4RX before 5.4R7.1, an unauthenticated, remote attacker can conduct a session hijacking attack.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

8.26%

94.2th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Ivanti	Connect Secure	8.3
Pulsesecure	Pulse Connect Secure	8.3rx
Pulsesecure	Pulse Connect Secure	9.0r1
Pulsesecure	Pulse Connect Secure	9.0r2
Pulsesecure	Pulse Connect Secure	9.0r2.1
Pulsesecure	Pulse Connect Secure	9.0r3
Pulsesecure	Pulse Connect Secure	9.0r3.1
Pulsesecure	Pulse Connect Secure	9.0r3.2
Pulsesecure	Pulse Connect Secure	9.0rx
Pulsesecure	Pulse Policy Secure	5.4r1
Pulsesecure	Pulse Policy Secure	5.4r2
Pulsesecure	Pulse Policy Secure	5.4r2.1
Pulsesecure	Pulse Policy Secure	5.4r3
Pulsesecure	Pulse Policy Secure	5.4r4
Pulsesecure	Pulse Policy Secure	5.4r5
Pulsesecure	Pulse Policy Secure	5.4r5.2
Pulsesecure	Pulse Policy Secure	5.4r6
Pulsesecure	Pulse Policy Secure	5.4r6.1
Pulsesecure	Pulse Policy Secure	5.4r7
Pulsesecure	Pulse Policy Secure	5.4rx
Pulsesecure	Pulse Policy Secure	9.0r1
Pulsesecure	Pulse Policy Secure	9.0r2
Pulsesecure	Pulse Policy Secure	9.0r2.1
Pulsesecure	Pulse Policy Secure	9.0r3
Pulsesecure	Pulse Policy Secure	9.0r3.1
Pulsesecure	Pulse Policy Secure	9.0rx

References

http://www.securityfocus.com/bid/108073Third Party Advisory, VDB Entry
https://devco.re/blog/2019/09/02/attacking-ssl-vpn-part-3-the-golden-Pulse-Secure-ssl-vpn-rce-chain-with-Twitter-as-case-study/Exploit, Third Party Advisory
https://i.blackhat.com/USA-19/Wednesday/us-19-Tsai-Infiltrating-Corporate-Intranet-Like-NSA.pdfExploit, Third Party Advisory
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44101Third Party Advisory, Vendor Advisory
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2019-0010Third Party Advisory
https://www.kb.cert.org/vuls/id/927237Third Party Advisory, US Government Resource
http://www.securityfocus.com/bid/108073Third Party Advisory, VDB Entry
https://devco.re/blog/2019/09/02/attacking-ssl-vpn-part-3-the-golden-Pulse-Secure-ssl-vpn-rce-chain-with-Twitter-as-case-study/Exploit, Third Party Advisory
https://i.blackhat.com/USA-19/Wednesday/us-19-Tsai-Infiltrating-Corporate-Intranet-Like-NSA.pdfExploit, Third Party Advisory
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44101Third Party Advisory, Vendor Advisory
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2019-0010Third Party Advisory
https://www.kb.cert.org/vuls/id/927237Third Party Advisory, US Government Resource

Timeline

Published: Apr 26, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-11540?

How severe is CVE-2019-11540?

CVE-2019-11540 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 8.26% probability of exploitation in the next 30 days.

How do I fix CVE-2019-11540?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-11540?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST