SB2026100948 - Remote code execution in Citrix NetScaler ADC and Citrix NetScaler Gateway

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Main Vulnerability Database SB2026100948

SB2026100948 - Remote code execution in Citrix NetScaler ADC and Citrix NetScaler Gateway

Published: October 9, 2026

Security Bulletin ID SB2026100948
CSH Severity
Critical
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

Critical 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Buffer overflow (CVE-ID: CVE-2026-107406)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: 9.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H]


The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in Citrix NetScaler ADC and Citrix NetScaler Gateway when the appliance is configured as a SAML service provider or identity provider, subject to version-specific configuration requirements. A remote attacker can send specially crafted authentication requests to the affected system, trigger buffer overflow and execute arbitrary code with elevated privileges.


Remediation

Install update from vendor's website.

References