CVE-2019-19781VulnerabilityPublished 11/03/2021Updated 10/24/2026
CVE-2019-19781: Citrix ADC, Gateway, and SD-WAN WANOP Appliance Code Execution Vulnerability
Affects Citrix Application Delivery Controller (ADC), Gateway, and SD-WAN WANOP ApplianceSource CISA KEV
Severity
HighNo CVSS score published yet
- Exploitation
Actively exploited – in CISA KEV since 11/03/2021
- KEV deadline
- 05/03/2022
- Ransomware
- Used in ransomware campaigns
- EPSS
- 100.0% chance of exploitation in 30 days – higher than 99% of CVEs
What to do
CISA required action
Apply updates per vendor instructions.
Description
CVE-2019-19781 is a high-severity vulnerability affecting Citrix ADC, Citrix Gateway, and multiple Citrix SD-WAN WANOP appliance models. It allows an unauthenticated attacker to execute arbitrary code on vulnerable devices. This vulnerability has been exploited in the wild and is known to have been used in ransomware campaigns. No specific affected versions or patch information are provided in the input data.