NetScaler ADC and Gateway
CVE-2026-13474: Denial of service via malformed HTTP/2 requests
Denial of service via malformed HTTP/2 requests in NetScaler ADC and NetScaler Gateway if HTTP/2 is enabled in HTTP Profile and associated with the virtual server (of type LB, CS, VPN) or the service configured on NetScaler
Published
ExploitedNot in CISA KEV
Ransomware useNot reportedPer CISA
SeverityHIGHCVSS 4.0 8.7
EPSS0.56%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 | 72.61 or later |
| ADC 13.1 | 63.18 or later |
| ADC 14.1 FIPS | 72.61 or later |
| ADC 13.1 FIPS and NDcPP | 37.272 or later |
| Gateway 14.1 | 72.61 or later |
| Gateway 13.1 | 63.18 or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
Denial of service via malformed HTTP/2 requests in NetScaler ADC and NetScaler Gateway if HTTP/2 is enabled in HTTP Profile and associated with the virtual server (of type LB, CS, VPN) or the service configured on NetScaler
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 11 Oct 2026.