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

Critical severity, CVSS 9.8. Actively exploited: in CISA KEV since 2021-11-03. EPSS: 100% chance of exploitation in the next 30 days.

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.

Affected products

• Citrix Application Delivery Controller Firmware: version 10.5 only; version 11.1 only; version 12.0 only; version 12.1 only; version 13.0 only
• Citrix Gateway Firmware: version 13.0 only
• Citrix NetScaler Gateway Firmware: version 10.5 only; version 11.1 only; version 12.0 only; version 12.1 only

Published 2019-12-27. Last modified 2026-08-12.