Citrix Patches Critical Authentication Bypass Flaw in NetScaler ADC and Gateway

Citrix has patched two vulnerabilities in NetScaler ADC and NetScaler Gateway, including a critical authentication bypass flaw identified as CVE-2026-19490. The company is urging customers to review the official security bulletin, assess their deployments, and upgrade affected appliances to recommended builds immediately. The advisory was issued by Anil Shetty, Senior VP of Engineering at Cloud Software Group. No specific exploitation or impact details beyond the authentication bypass were provided in the notice. The vulnerability affects NetScaler ADC and NetScaler Gateway products.