A new, highly critical Remote Code Execution (RCE) vulnerability, tracked as CVE-2026-107406, has been discovered in Citrix NetScaler ADC and Gateway appliances. This unauthenticated flaw allows remote attackers to execute arbitrary commands on the underlying operating system, potentially leading to full appliance takeover and deep lateral movement within enterprise networks.\n\nOur latest threat briefing covers the technical mechanics of the NetScaler exploit, active scanning indicators, and the immediate emergency patching protocols organizations must implement to secure their perimeter.\n\nRead the full zero-day analysis and remediation guide on our official security portal.