CVE-2026-19490
Citrix NetScaler Authentication Bypass Using an Alternate Path or Channel Vulnerability
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.
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. Deadline for federal agencies: 2026-09-12.
9 articles across 6 outlets · first covered Aug 19, 2026 · latest Sep 27, 2026
Coverage timeline
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Citrix NetScaler Zero Days Exploited Against Unpatched Systemssecurityaffairs.com · Sep 27, 2026
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CISA Tracks Exploitation of Critical N-central, GitLab and MikroTik Flawssecurityonline.info · Sep 14, 2026
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CISA Flags Four Actively Exploited Flaws Including Cisco Zero Daysecurityaffairs.com · Sep 10, 2026
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CISA Warns Attackers Are Exploiting Critical Citrix NetScaler Flawwww.securityweek.com · Sep 10, 2026
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CISA Flags Cisco, Citrix and Fortinet Flaws Under Active Attackthehackernews.com · Sep 10, 2026
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CISA Warns of Actively Exploited Citrix NetScaler Auth Bypasscisa.gov · Sep 10, 2026
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Citrix fixes NetScaler auth bypass flaw CVE-2026-19490www.securityweek.com · Aug 20, 2026
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CVE-2026-19490: Critical Vulnerability Affecting Citrix NetScaler ADC and NetScaler Gatewaywww.rapid7.com · Aug 19, 2026
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Citrix patches critical NetScaler auth bypass flaw CVE-2026-19490securityonline.info · Aug 19, 2026