Critical 9.3Known exploited (CISA KEV)Published Aug 19, 2026

CVE-2026-19490NetScaler ADC and NetScaler Gateway Security Bulletin for CVE-2026-19490

Updated under an hour ago (Oct 26, 2026, 3:00 PM ET)

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It affects NetScaler ADC and 3 other products. Add what you run to find out whether that includes you.

CISA lists it as known exploited since Sep 9, 2026; federal agencies had to remediate by Sep 12, 2026. Treat that date as your deadline.

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Every CVE for NetScaler ADC

Exploited in the last 30 days

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: 9.3 CRITICAL (v4.0, CNA)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
Weakness (CWE): CWE-288
Known exploited: Added to CISA KEV Sep 9, 2026; federal remediation due Sep 12, 2026Apply 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.
EPSS (exploitation in the next 30 days): 32.65% (percentile 98)
Assigned by: NetScaler
NVD analysis: Analyzed
Record last updated: Oct 7, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

NetScaler ADC netscaler:adc (from the name)	from 14.1 through 73.32; from 13.1 through 63.21	CNA record
NetScaler Gateway netscaler:gateway (from the name)	from 14.1 through 73.32; from 13.1 through 63.21	CNA record
citrix netscaler_application_delivery_controller citrix:netscaler_application_delivery_controller	from 13.1 before 13.1-37.277; from 13.1 before 13.1-37.277; from 13.1 before 13.1-63.21; from 14.1 before 14.1-73.32; from 14.1-66.68 through 14.1-73.32	NVD
citrix netscaler_gateway citrix:netscaler_gateway	from 13.1 before 13.1-63.21; from 14.1 before 14.1-73.32	NVD

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.