CVE-2026-3055
CriticalActively exploited (CISA KEV)
Description
Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread
SeverityCritical
CVSS9.8
Exploit probability—
Product
Citrix NetScaler
PublishedMar 23, 2026
First seenMar 23, 2026
Added to KEVMar 30, 2026
Weakness typeCWE-125Out-of-bounds read
How to fix
CISA 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.
CISA due date: Apr 2, 2026Update
- citrix netscaler_application_delivery_controller13.1-37.262, 13.1-62.23, 14.1-60.58 or later
- citrix netscaler_gateway13.1-62.23, 14.1-60.58 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| citrix netscaler_application_delivery_controller | 13.1 ≤ v < 13.1-37.262, 13.1 ≤ v < 13.1-62.23, 14.1 ≤ v < 14.1-60.58 | 13.1-37.262, 13.1-62.23, 14.1-60.58 |
| citrix netscaler_gateway | 13.1 ≤ v < 13.1-62.23, 14.1 ≤ v < 14.1-60.58 | 13.1-62.23, 14.1-60.58 |
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