A critical authentication bypass vulnerability (CVE-2026-19490) in Citrix NetScaler ADC and Gateway allows attackers to circumvent authentication controls. The article does not provide the CVSS score, specific affected version ranges, or the exact fixed version numbers. Citrix strongly urges customers to review their security bulletin and upgrade impacted appliances to the recommended builds immediately.
Citrix has patched two vulnerabilities in NetScaler ADC and NetScaler Gateway, including a critical authentication bypass flaw tracked as CVE-2026-19490, and is urging customers to upgrade affected appliances as soon as possible. “We strongly recommend that customers review the official NetScaler ADC and NetScaler Gateway security bulletin, assess whether their deployments are affected, and upgrade impacted appliances to the recommended builds as soon as possible,” Anil Shetty, senior VP of Engineering with Cloud Software Group … More → The post Citrix urges customers to fix critical NetScaler authentication bypass (CVE-2026-19490) appeared first on Help Net Security .