On March 23, 2026, Citrix published a security advisory for a critical vulnerability affecting their NetScaler ADC (formerly Citrix ADC) and NetScaler Gateway (formerly Citrix Gateway) products.
This vulnerability, CVE-2026-3055, which is classified as an out-of-bounds read and holds a CVSS score of 9.3, allows unauthenticated remote attackers to leak potentially sensitive information from the appliance’s memory. The Citrix advisory states that systems configured as a SAML Identity Provider (SAML IDP) are vulnerable, whereas default configurations are unaffected. This SAML IDP configuration is likely a very common configuration for organizations utilizing single sign-on.
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Source: Rapid7
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