Threat Actors Actively Exploiting Citrix NetScaler Authentication Bypass Vulnerability (CVE-2026-19490)

Reports have emerged of active exploitation targeting a recently patched authentication bypass vulnerability, CVE-2026-19490, affecting Citrix NetScaler Application Delivery Controller (ADC) and NetScaler Gateway deployments. This activity follows the release of public exploit code and poses significant risks, as these systems are commonly used for secure remote access and application delivery.