NetScaler ADC and Gateway
CVE-2026-3055: Insufficient input validation leading to memory overread
Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread
Published
ExploitedYes, in CISA KEVAdded 30 Mar 2026
Ransomware useNot reportedPer CISA
SeverityCRITICALCVSS 4.0 9.3
EPSS4.0%Chance of exploitation in 30 days
Public exploitNot tracked
FixAvailable
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| ADC 14.1 | 66.59 or later |
| ADC 13.1 | 62.23 or later |
| ADC 13.1 FIPS and NDcPP | 37.262 or later |
| Gateway 14.1 | 66.59 or later |
| Gateway 13.1 | 62.23 or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread
Exploitation
CISA lists this CVE as exploited in the wild since 30 Mar 2026.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 11 Oct 2026.