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

Source: https://junglewise.ai/threats/cve-2019-19781-citrix-adc-gateway-and-sd-wan-wanop-appliance-code-execution  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2021-11-03. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2019-19781 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2021-11-03

Citrix ADC, Gateway, and SD-WAN WANOP appliances are vulnerable to a directory traversal flaw. An unauthenticated remote attacker can exploit this to perform arbitrary code execution on the affected system.

Technologies: [Citrix Application Delivery Controller (ADC)](https://junglewise.ai/threats/technologies/application-delivery-controller-adc), [Citrix Gateway](https://junglewise.ai/threats/technologies/gateway), [Citrix Sd-Wan Wanop Appliance](https://junglewise.ai/threats/technologies/sd-wan-wanop-appliance). Vendors: [Citrix](https://junglewise.ai/threats/vendors/citrix).

## Quick answers

**Is CVE-2019-19781 exploited in the wild?** Yes. CVE-2019-19781 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.

**How severe is CVE-2019-19781?** Critical severity, with a CVSS score of 9.8, published 3 November 2021.

**Which products and versions are affected?** Citrix Application Delivery Controller (ADC) 10.5, 11.1, 12.0, 12.1, 13.0; Citrix Gateway 10.5, 11.1, 12.0, 12.1, 13.0; Citrix SD-WAN WANOP.

**Is there a fix for CVE-2019-19781?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2019-19781 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2019-19781?** Check whether you run Citrix Application Delivery Controller (ADC), Citrix Gateway or Citrix Sd-Wan Wanop Appliance. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Citrix Application Delivery Controller (ADC) 10.5, 11.1, 12.0, 12.1, 13.0
- Citrix Gateway 10.5, 11.1, 12.0, 12.1, 13.0
- Citrix SD-WAN WANOP

## Timeline

- 2021-11-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
- 2021-11-03: disclosed

## Related threats

- [Citrix NetScaler ADC and Gateway out-of-bounds read](https://junglewise.ai/threats/cve-2025-5777-citrix-netscaler-adc-and-gateway-out-of-bounds-read)
- [Citrix NetScaler ADC and Gateway buffer overflow](https://junglewise.ai/threats/cve-2025-6543-citrix-netscaler-adc-and-gateway-buffer-overflow)
- [Citrix Application Delivery Controller (ADC) and Gateway Authentication Bypass Vulnerability](https://junglewise.ai/threats/cve-2022-27518-citrix-application-delivery-controller-adc-and-gateway)
- [Citrix ADC, Gateway, and SD-WAN WANOP Appliance Information Disclosure Vulnerability](https://junglewise.ai/threats/cve-2020-8196-citrix-adc-gateway-and-sd-wan-wanop-appliance-information)
- [Citrix ADC, Gateway, and SD-WAN WANOP Appliance Information Disclosure Vulnerability](https://junglewise.ai/threats/cve-2020-8195-citrix-adc-gateway-and-sd-wan-wanop-appliance-information)