# CVE-2019-19781: Citrix ADC, Gateway, and SD-WAN WANOP Appliance Code Execution Vulnerability

> CVE-2019-19781: Citrix ADC, Gateway, and SD-WAN WANOP Appliance Code Execution Vulnerability. CVSS 9.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2019-19781
Last updated: 2026-08-12T03:55:42Z

- Published: 2019-12-27 13:06 UTC · Updated: 2026-08-12 03:55 UTC · Assigner: mitre
- CVSS: 9.8 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS: 100.0%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2021-11-03, federal due date 2022-05-03, ransomware use: Known

## Description

An issue was discovered in Citrix Application Delivery Controller (ADC) and Gateway 10.5, 11.1, 12.0, 12.1, and 13.0. They allow Directory Traversal.

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- Citrix: Application Delivery Controller (ADC), Gateway, and SD-WAN WANOP Appliance

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2019-19781)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2019-19781)
- [http://packetstormsecurity.com/files/155904/Citrix-Application-Delivery-Controller-Gateway-Remote-Code-Execution.html](http://packetstormsecurity.com/files/155904/Citrix-Application-Delivery-Controller-Gateway-Remote-Code-Execution.html)
- [http://packetstormsecurity.com/files/155905/Citrix-Application-Delivery-Controller-Gateway-Remote-Code-Execution-Traversal.html](http://packetstormsecurity.com/files/155905/Citrix-Application-Delivery-Controller-Gateway-Remote-Code-Execution-Traversal.html)
- [http://packetstormsecurity.com/files/155930/Citrix-Application-Delivery-Controller-Gateway-10.5-Remote-Code-Execution.html](http://packetstormsecurity.com/files/155930/Citrix-Application-Delivery-Controller-Gateway-10.5-Remote-Code-Execution.html)
- [http://packetstormsecurity.com/files/155947/Citrix-ADC-NetScaler-Directory-Traversal-Remote-Code-Execution.html](http://packetstormsecurity.com/files/155947/Citrix-ADC-NetScaler-Directory-Traversal-Remote-Code-Execution.html)
- [http://packetstormsecurity.com/files/155972/Citrix-ADC-Gateway-Path-Traversal.html](http://packetstormsecurity.com/files/155972/Citrix-ADC-Gateway-Path-Traversal.html)
- [https://badpackets.net/over-25000-citrix-netscaler-endpoints-vulnerable-to-cve-2019-19781/](https://badpackets.net/over-25000-citrix-netscaler-endpoints-vulnerable-to-cve-2019-19781/)
- [https://forms.gle/eDf3DXZAv96oosfj6](https://forms.gle/eDf3DXZAv96oosfj6)
- [https://support.citrix.com/article/CTX267027](https://support.citrix.com/article/CTX267027)
- [https://twitter.com/bad\_packets/status/1215431625766424576](https://twitter.com/bad_packets/status/1215431625766424576)
- [https://www.kb.cert.org/vuls/id/619785](https://www.kb.cert.org/vuls/id/619785)

---

_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


---
Canonical: https://rewindex.com/cve/CVE-2019-19781 · Markdown: https://rewindex.com/cve/CVE-2019-19781.md · JSON: https://rewindex.com/api/v1/cves/CVE-2019-19781 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:46:26.630Z