Check Point Advisories

Citrix NetScaler Out Of Bounds Read (CVE-2026-3055)

Vulnerability
Protection

Check Point Reference:	CPAI-2026-2343
Date Published:	29 Mar 2026
Severity:	High
Last Updated:	Monday 30 March, 2026
Source:
Industry Reference:	CVE-2026-3055
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	NetScaler ADC and NetScaler Gateway prior to 14.1-60.58 NetScaler ADC and NetScaler Gateway prior to 13.1-62.23 NetScaler ADC FIPS and NDcPP prior to 13.1-37.262
Vulnerability Description	An out of bounds read vulnerability in Citrix NetScaler ADC and NetScaler Gateway when configured as a SAML IDP allows attackers to read memory contents, potentially exposing sensitive information.

Protection Overview

This protection detects attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R81 / R80 / R77 / R75

In the IPS tab, click Protections and find the Citrix NetScaler Out Of Bounds Read (CVE-2026-3055) protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: Web Server Enforcement Violation.
Attack Information: Citrix NetScaler Out Of Bounds Read (CVE-2026-3055)