Memory overflow in HTTP/3 (QUIC) can lead to unpredictable or erroneous behavior or Denial of Service in Citrix NetScaler ADC and Citrix NetScaler Gateway

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-120865
StatePUBLISHED
AssignerNetScaler
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-13 09:17:34 UTC
Updated2026-11-13 09:17:34 UTC
DescriptionMemory overflow in HTTP/3 (QUIC) can lead to unpredictable or erroneous behavior or Denial of Service in Citrix NetScaler ADC and Citrix NetScaler Gateway.

Risk And Classification

Primary CVSS: v4.0 8.7 HIGH from 50a63c94-1ea7-4568-8c11-eb79e7c5a2b5

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

VersionSourceTypeScoreSeverityVector
4.050a63c94-1ea7-4568-8c11-eb79e7c5a2b5Secondary8.7HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:L/SI:L/SA:L/E:X/C...
4.0CNACVSS8.7HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:L/SI:L/SA:L

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Confidentiality
None
Integrity
None
Availability
High
Sub Conf.
Low
Sub Integrity
Low
Sub Availability
Low

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Citrix NetScaler ADC affected 14.1-73.57 patch Not specified
CNA Citrix NetScaler ADC affected 13.1-64.39 patch Not specified
CNA Citrix NetScaler ADC affected 14.1-73.58 FIPS patch Not specified
CNA Citrix NetScaler ADC affected 13.1-37.293 FIPs and NDcPP patch Not specified
CNA Citrix NetScaler Gateway affected 14.1-73.57 patch Not specified
CNA Citrix NetScaler Gateway affected 13.1-64.39 patch Not specified

References

ReferenceSourceLinkTags
support.citrix.com/support-home/kbsearch/article 50a63c94-1ea7-4568-8c11-eb79e7c5a2b5 support.citrix.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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