# CVE-2019-11539 — Ivanti Connect Secure 8.1 **CISA KEV** · **Ransomware** > As of 2025-10-21, CVE-2019-11539 is a HIGH-severity vulnerability in Ivanti Connect Secure 8.1, CVSS v3.1 8, EPSS 98.6% (99.9th percentile). It is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), with a US federal remediation deadline of 2022-05-03, and CISA links it to known ransomware campaigns. Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2019-11539, most recently “Sen. Wyden Urges Binding Federal Mandate to Purge Internet-Facing Legacy VPNs for Zero-Trust Remote Access”. **Last updated:** 2025-10-21 ## What is CVE-2019-11539? In Pulse Secure Pulse Connect Secure version 9.0RX before 9.0R3.4, 8.3RX before 8.3R7.1, 8.2RX before 8.2R12.1, and 8.1RX before 8.1R15.1 and Pulse Policy Secure version 9.0RX before 9.0R3.2, 5.4RX before 5.4R7.1, 5.3RX before 5.3R12.1, 5.2RX before 5.2R12.1, and 5.1RX before 5.1R15.1, the admin web interface allows an authenticated attacker to inject and execute commands. The record classifies CVE-2019-11539 under weakness class [CWE-78](https://intel.threadlinqs.com/cwe/CWE-78). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs high-privilege credentials, needs no user interaction, and has high impact on confidentiality, integrity, availability. 30 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 2719 days ago. ## Severity and exploitation probability - **CVSS v3.1 base score:** 8 — HIGH (`CVSS:3.0/AC:H/AV:N/A:H/C:H/I:H/PR:H/S:C/UI:N`) - **EPSS (FIRST):** 98.6% probability of exploitation in the next 30 days, higher than 99.9% of all scored CVEs - **CISA KEV:** Listed since 2021-11-03, federal remediation deadline 2022-05-03 — used in known ransomware campaigns - **Threadlinqs priority:** 10/10 — CISA lists it as used in ransomware, which Threadlinqs scores at the maximum - **Published:** 2019-04-26, last modified 2025-10-21 ## Is CVE-2019-11539 being exploited? CISA added CVE-2019-11539 to the Known Exploited Vulnerabilities catalog on 2021-11-03, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2022-05-03 under BOD 22-01. CISA flags the vulnerability as one used in known ransomware campaigns. Weaponised exploit code for CVE-2019-11539 is publicly available. 2 public proof-of-concept repositories are tracked for this identifier. It currently carries a trending score of 43 in the Threadlinqs vulnerability feed. - [0xDezzy/CVE-2019-11539](https://github.com/0xDezzy/CVE-2019-11539) (github) - [trickest/cve](https://github.com/trickest/cve/blob/main/2019/CVE-2019-11539.md) (trickest) ## Affected products and versions - [Ivanti](https://intel.threadlinqs.com/vendors/ivanti): Connect Secure 8.1, Connect Secure 8.2 _Showing 2 of 30 recorded product entries._ ## How to fix CVE-2019-11539 Vendor advisory: [https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44101](https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44101). Because CVE-2019-11539 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2022-05-03. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory. ## Threat activity tracking CVE-2019-11539 1 tracked threat in the Threadlinqs corpus references CVE-2019-11539, either in the campaign’s CVE list or as an indicator on the campaign record. - [Sen. Wyden Urges Binding Federal Mandate to Purge Internet-Facing Legacy VPNs for Zero-Trust Remote Access](https://intel.threadlinqs.com/threat/TL-2026-1774) — MEDIUM · 2026-07-27 ## Sources Enriched from CVE.org, NVD, FIRST EPSS, CISA KEV, GitHub Security Advisories, public proof-of-concept repositories. Last verified by Threadlinqs on 2026-07-30. This product uses the NVD API but is not endorsed or certified by the NVD. **Vendor advisory and patch** - [kb.pulsesecure.net](https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44101) - [psirt.global.sonicwall.com](https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2019-0010) **Third-party advisory** - [kb.cert.org — third party advisory](https://www.kb.cert.org/vuls/id/927237) **Vulnerability database entry** - [securityfocus.com — vdb entry](http://www.securityfocus.com/bid/108073) **Other references** - [i.blackhat.com](https://i.blackhat.com/USA-19/Wednesday/us-19-Tsai-Infiltrating-Corporate-Intranet-Like-NSA.pdf) - [packetstormsecurity.com](http://packetstormsecurity.com/files/154376/Pulse-Secure-8.1R15.1-8.2-8.3-9.0-SSL-VPN-Remote-Code-Execution.html) - [devco.re](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/) - [packetstormsecurity.com (Pulse Secure VPN Arbitrary Command Execu)](http://packetstormsecurity.com/files/155277/Pulse-Secure-VPN-Arbitrary-Command-Execution.html) - [packetstormsecurity.com (Pulse Secure VPN Arbitrary Command Execu)](http://packetstormsecurity.com/files/162092/Pulse-Secure-VPN-Arbitrary-Command-Execution.html) Canonical: https://intel.threadlinqs.com/cve/CVE-2019-11539 Full detection coverage and IOCs for threats exploiting CVE-2019-11539 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp