CVE-2026-19490: Citrix NetScaler Authentication Bypass Using an Alternate Path or Channel Vulnerability

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.

From the National Vulnerability Database. This product uses the NVD API but is not endorsed or certified by the NVD.

• https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696939
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-19490