CISA KEV: CVE-2026-19490 — Citrix NetScaler actively exploited

Citrix NetScaler Authentication Bypass Using an Alternate Path or Channel Vulnerability. Citrix NetScaler ADC and NetScaler Gateway contain an authentication-bypass vulnerability involving an alternate path or channel. When the NetScaler appliance is configured as an AAA virtual server or as a Gateway (SSL VPN, ICA Proxy, CVPN, or RDP Proxy), an unauthenticated remote threat actor may be able to bypass authentication. Required action: Apply mitigations in accordance with vendor instructions, ens