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CVE-2026-19490

CRITICAL CISA KEV

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.

Published: Aug 19, 2026 Modified: Sep 10, 2026
CWE-288

CVSS Metrics

CVSSv3
Attack Vector: NETWORK Attack Complexity: LOW Privileges Required: NONE User Interaction: NONE Scope: UNCHANGED Confidentiality Impact: HIGH Integrity Impact: HIGH Availability Impact: HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Products (7)

Vendor Product Version
citrix netscaler_application_delivery_controller * ≥ 13.1 < 13.1-37.277
citrix netscaler_application_delivery_controller * ≥ 13.1 < 13.1-37.277
citrix netscaler_application_delivery_controller * ≥ 13.1 < 13.1-63.21
citrix netscaler_application_delivery_controller * ≥ 14.1 < 14.1-73.32
citrix netscaler_application_delivery_controller * ≥ 14.1-66.68
citrix netscaler_gateway * ≥ 13.1 < 13.1-63.21
citrix netscaler_gateway * ≥ 14.1 < 14.1-73.32

GitHub Security Advisory GHSA-7c6h-rhhv-wm8r

Vulnerability in NetScaler ADC and NetScaler Gateway. This issue affects ADC: from 14.1 through...

Risk Scores

CVSS Score 9.8 / 10
EPSS Score 5.60%

Top 8% most likely to be exploited

Threat Score 70.9 / 100

CISA Known Exploited

Date Added: 2026-09-09
Due Date: 2026-09-12
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.

Data Sources

NVD CISA KEV EPSS GitHub