CVE-2026-3055CitrixFirewall and VPNMarch 30, 2026

Citrix NetScaler Out-of-Bounds Read Vulnerability

Critical 9.8Actively exploited

Description

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.

What to do

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

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Details

Vendor
Citrix
Product
NetScaler
CVE
CVE-2026-3055
Affected versions
NetScaler ADC / Gateway 13.1: 13.1 before 13.1-62.23 — fixed in 13.1-62.23
NetScaler ADC FIPS / NDcPP 13.1: 13.1 before 13.1-37.262 — fixed in 13.1-37.262
NetScaler ADC / Gateway 14.1: 14.1 before 14.1-60.58 — fixed in 14.1-60.58 (from the advisory and NVD; check the exact builds in the official advisory)
CVSS score
9.8
Actively exploited
Yes, listed in the CISA Known Exploited Vulnerabilities catalog
CISA due date
April 2, 2026 (deadline for US federal agencies: a good benchmark for you too)
Source
CISA KEV – original advisory
Published
March 30, 2026

The description and the recommended action are quoted from the public advisory; severity, exploitation status and affected versions are compiled automatically from public sources and may contain errors. The vendor's original advisory prevails: check it before taking action. This information is provided without warranty and does not replace a professional assessment.

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