CVE-2026-3055: Citrix NetScaler Out-of-Bounds Read Vulnerability

Added to the CISA Known Exploited Vulnerabilities catalog on 30 Mar 2026. Vendor: Citrix. Product: NetScaler.

Citrix NetScaler ADC (formerly Citrix ADC), NetScaler Gateway (formerly Citrix Gateway) and NetScaler ADC FIPS and NDcPP contain an out-of-bounds reads vulnerability when configured as a SAML IDP leading to memory overread.

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. (due 02 Apr 2026)