Citrix NetScaler ADC/Gateway RCE flaw patched
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CERT-FR advises patching a remote code execution and denial-of-service vulnerability in Citrix NetScaler ADC and Gateway.
CERT-FR published an advisory for a vulnerability affecting Citrix NetScaler ADC and NetScaler Gateway, tracked as CVE-2026-107406. The flaw allows a remote attacker to execute arbitrary code and cause a denial of service on affected appliances. Affected versions include NetScaler ADC 13.1-FIPS before 13.1-NDcPP 13.1.37.283, 13.1.x before 13.1-64.29, 14.1-FIPS before 14.1-73.46 FIPS, and 14.1.x before 14.1-73.46, as well as NetScaler Gateway 13.1.x before 13.1-64.29 and 14.1.x before 14.1-73.46.
Citrix has released a security bulletin (CTX697191, dated 09 October 2026) with patched versions. No in-the-wild exploitation is mentioned in the advisory. Given the history of NetScaler ADC/Gateway vulnerabilities being targeted shortly after disclosure (e.g., Citrix Bleed), defenders running affected versions should prioritize patching promptly, especially for internet-facing Gateway deployments used for remote access, and monitor for anomalous activity on these appliances.
No indicators of compromise, threat actor attribution, or malware association are provided in this advisory; it is a vendor patch notification distributed through the French national CERT.
Mentioned in this report
Source reporting: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-1285
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