CVE-2026-8655: Multiple Memory overflow vulnerabilities in NetScaler ADC and NetScaler Gateway leading to unpredictable or erroneous behavior and Denial of Service if…

PriorityP358critical9.8CVSS 3.1

AVNACLPRNUINSUCHIHAH

EPSS

0.63%

48.2th percentile

Multiple Memory overflow vulnerabilities in NetScaler ADC and NetScaler Gateway leading to unpredictable or erroneous behavior and Denial of Service if NetScaler ADC is configured as an LB of type Oracle OR NetScaler ADC is configured as a DNS Proxy OR NetScaler ADC is configured as a DNS recursive resolver deployment

Affected

19 ranges

Vendor	Product	Version range	Fixed in
citrix	citrix_adm	—	—
citrix	citrix_hypervisor	—	—
citrix	citrix_virtual_apps_and_desktops	—	—
citrix	endpoint_management	—	—
citrix	netscaler_adc	—	—
citrix	netscaler_application_delivery_controller	< 13.1-37.272	13.1-37.272
citrix	netscaler_application_delivery_controller	—	—
citrix	netscaler_application_delivery_controller	>= 13.1 < 13.1-63.18	13.1-63.18
citrix	netscaler_application_delivery_controller	>= 14.1 < 14.1-72.61	14.1-72.61
citrix	netscaler_gateway	—	—
citrix	netscaler_gateway	>= 13.1 < 13.1-63.18	13.1-63.18
citrix	netscaler_gateway	>= 14.1 < 14.1-72.61	14.1-72.61
citrix	xenserver	—	—
netscaler	adc	>= 13.1 < 63.18	63.18
netscaler	adc	>= 13.1 FIPS and NDcPP < 37.272	37.272
netscaler	adc	>= 14.1 < 72.61	72.61
netscaler	adc	>= 14.1 FIPS < 72.61	72.61
netscaler	gateway	>= 13.1 < 63.18	63.18
netscaler	gateway	>= 14.1 < 72.61	72.61

CVSS provenance

nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvdv4.08.8HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/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

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