CVE-2026-19490
critical CISA KEVCitrix NetScaler Authentication Bypass Using an Alternate Path or Channel Vulnerability
Vendor / product: Citrix — NetScaler
Vulnerability in NetScaler ADC and NetScaler Gateway. This issue affects ADC: from 14.1 through 73.32 and from 13.1 through 63.21; Gateway: from 14.1 through 73.32 and from 13.1 through 63.21.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Required action (CISA)
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.
Affected products
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
References
- https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696939 50a63c94-1ea7-4568-8c11-eb79e7c5a2b5
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-19490 134c704f-9b21-4f2e-91b3-4a467353bcc0