CVE-2019-18225: Citrix Application Delivery Controller Firmware

Critical severity, CVSS 9.8. EPSS: 1.5% chance of exploitation in the next 30 days.

An issue was discovered in Citrix Application Delivery Controller (ADC) and Gateway before 10.5 build 70.8, 11.x before 11.1 build 63.9, 12.0 before build 62.10, 12.1 before build 54.16, and 13.0 before build 41.28. An attacker with management-interface access can bypass authentication to obtain appliance administrative access. These products formerly used the NetScaler brand name.

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 2019-10-21. Last modified 2026-06-17.