NewsExploited · CISA KEVCitrix · NetScaler
Citrix NetScaler Authentication Bypass Using an Alternate Path or Channel Vulnerability
CVE-2026-19490
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.
CISA's required action · due for U.S. federal civilian agencies
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Cited by CISA: support.citrix.com · nvd.nist.gov
Added to KEV · Source checked · CISA KEV entry
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