{"id":"CVE-2026-19490","vendor_project":"Citrix","product":"NetScaler","vulnerability_name":"Citrix NetScaler Authentication Bypass Using an Alternate Path or Channel Vulnerability","date_added":"2026-09-09","due_date":"2026-09-12","known_ransomware_use":"Unknown","short_description":"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, 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.","cwes":"CWE-288","cvss_version":"4.0","cvss_severity":"CRITICAL","cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","nvd_published":"2026-08-19","nvd_status":"Analyzed","epss":0.05597,"epss_percentile":0.92562,"cvss_score":9.3,"days_published_to_kev":21,"source":"https://data.cybermax-tools.workers.dev/cve/CVE-2026-19490","by":"CyberMax"}