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Vulnerabilities

Vulnerability · CVE-2026-13474

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…

Published Jun 30, 2026 · catalog updated Jul 2, 2026 · netscaler application delivery controller

Last checked Nov 2, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-13474. EPSS is 0.56%. Act only if a listed version of netscaler application delivery controller is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High8.7
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.56%
Remediation
Version ranges on file
Affected products
cpe citrix/netscaler application delivery controller · cpe citrix/netscaler gateway

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

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe citrix/netscaler application delivery controller14.1-66.68
  • cpe citrix/netscaler application delivery controller< 13.1-37.272
  • cpe citrix/netscaler application delivery controller< 13.1-63.18
  • cpe citrix/netscaler application delivery controller< 14.1-72.61
  • cpe citrix/netscaler gateway< 13.1-63.18

How to fix CVE-2026-13474

  • Upgrade

    CVE-2026-13474 lists a fix boundary at 13.1-37.272. Compare the installed build with that boundary before you change production.

  • Version check

    Affected < 13.1-37.272

  • Advisory

    Open the inventory_critical record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-13474. EPSS is 0.56%. Act only if a listed version of netscaler application delivery controller is installed.

Which versions are affected?

Compare what you have installed with citrix/netscaler application delivery controller 14.1-66.68; citrix/netscaler application delivery controller < 13.1-37.272; citrix/netscaler application delivery controller < 13.1-63.18; citrix/netscaler application delivery controller < 14.1-72.61. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-401: Missing Release of Memory after Effective Lifetime. EPSS 0.56%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Citrix NetScaler ADC / Gateway security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jun 30, 2026 · Monitored products — critical

    Detected

    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

  2. Jul 2, 2026 · Monitored products — critical

    Updated

    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

  • Monitored products — criticalVendor advisoryCVE-2026-13474

    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

    nvd.nist.gov

References

Freshness

Last verified in this catalog Nov 2, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • Monitored products — criticalNov 2, 2026