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CVE-2026-13474

Denial of service via malformed HTTP/2 requests

HIGH
7.5
CVSS Score
Published: June 30, 2026 at 01:03 PM UTC
Updated: July 2, 2026 at 05:08 PM UTC
4 products affected across 2 vendorsNetScaler GatewayNetscaler Application Delivery ControllerADC

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Severity
HIGH7.5
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

Description

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Netscaler Application Delivery Controller· Citrix
95%
v < 13.1-37.27213.1 ≤ v < 13.1-63.1814.1 ≤ v < 14.1-72.6114.1-66.68
Affected range stops below 13.1-37.272, so it looks safe — our inference, not a vendor statement
Affected range stops below 13.1-63.18, so it looks safe — our inference, not a vendor statement
Affected range stops below 14.1-72.61, so it looks safe — our inference, not a vendor statement
NetScaler Gateway· Citrix
95%
13.1 ≤ v < 13.1-63.1814.1 ≤ v < 14.1-72.61
Affected range stops below 13.1-63.18, so it looks safe — our inference, not a vendor statement
Affected range stops below 14.1-72.61, so it looks safe — our inference, not a vendor statement
ADC· Netscaler
60%
13.1 ≤ v < 63.1813.1 FIPS and NDcPP ≤ v < 37.27214.1 ≤ v < 72.6114.1 FIPS ≤ v < 72.6113.113.1 FIPS and NDcPP14.114.1 FIPS
Affected range stops below 37.272, so it looks safe — our inference, not a vendor statement
Affected range stops below 63.18, so it looks safe — our inference, not a vendor statement
Affected range stops below 72.61, so it looks safe — our inference, not a vendor statement
Gateway· Netscaler
60%
13.1 ≤ v < 63.1814.1 ≤ v < 72.6113.114.1
Affected range stops below 63.18, so it looks safe — our inference, not a vendor statement
Affected range stops below 72.61, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: cverecord
https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696604

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-401

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