Intelligence online17 sources monitored8 actively exploited 7d26 published 24hChecked recently
Vulnerability record

CVE-2026-19490

Citrix NetScaler Authentication Bypass Using an Alternate Path or Channel Vulnerability

CriticalExploitation confirmedCISA KEV
What should I do?

This vulnerability is in the CISA Known Exploited Vulnerabilities catalog: attackers are using it. If you run NetScaler ADC / Gateway, fix it now.

CISA 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.

US federal civilian agencies must remediate by Sep 12, 2026.

Patch status

No official fix confirmed yet

Until a fix ships, follow the vendor's mitigations and CISA's required action, limit exposure of affected systems, and watch this record for a patch.

Description

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.

Source: NIST National Vulnerability Database. Official vulnerability data, reproduced as published.

Affected products

ProductVendorSource
NetScaler ADC / GatewayCitrix (Cloud Software Group)KEV

Sources: KEV = CISA Known Exploited Vulnerabilities catalog. Version details have not been published yet.

Intelligence timeline

Developments from the last 30 days, newest first.

  1. CVSS scoredUpdateKEV

    CVE-2026-19490 scored CVSS 9.3: Citrix NetScaler, Citrix NetScaler Authentication Bypass Using an Alternate Path or Channel Vulnerability

    CISA lists this as exploited in the wild. Unpatched NetScaler systems are exposed to active attacks now.

    Basis: NIST National Vulnerability Database

  2. Added to CISA KEV

    CVE-2026-19490 added to CISA KEV: Citrix NetScaler, Citrix NetScaler Authentication Bypass Using an Alternate Path or Channel Vulnerability

    CISA lists this as exploited in the wild. Unpatched NetScaler systems are exposed to active attacks now.

    Basis: CISA Known Exploited Vulnerabilities catalog

Coverage

We have not published a story about this vulnerability yet.

References

  • support.citrix.com https://support.citrix.com/external/article/CTX696939/netscaler-adc-and-netscaler-gateway-secu.html
  • cisa.gov https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk
  • cisa.gov https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-ba…
  • nvd.nist.gov https://nvd.nist.gov/vuln/detail/CVE-2026-19490
  • support.citrix.com https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696939
  • cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-19490