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2026-010: Critical Vulnerabilities in Citrix NetScaler ADC and NetScaler Gateway

criticalCVE-2026-19489CVE-2026-19490
On 19 August 2026, Citrix published a security advisory addressing multiple critical vulnerabilities in NetScaler ADC (formerly Citrix ADC) and NetScaler Gateway (formerly Citrix Gateway). CERT-EU recommends updating affected devices as soon as possible.

CSIRTS triage

vendor: Citrixproduct: NetScaler ADC and NetScaler GatewayRemote code execution
What
Multiple critical vulnerabilities in NetScaler ADC and NetScaler Gateway allow remote code execution.
Who is affected
Deployments of Citrix NetScaler ADC and NetScaler Gateway are affected.
Urgency
Immediate remediation required; critical severity and active advisory from vendor.
Action
Apply Citrix security updates for NetScaler ADC and NetScaler Gateway immediately.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CERT-EU Security Advisories (EU · eu · site)
Severity
critical
Published
2026-08-19
Exploitation
Not in CISA KEV at last sync

Original advisory: https://cert.europa.eu/publications/security-advisories/2026-010/

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-19489coverage & exploitation statusNVD · CVE.org
CVE-2026-19490coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for 2026-010

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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