CVE-2026-8655

Multiple Memory overflow vulnerabilities leading to unpredictable or erroneous behavior and Denial of Service

At a glance

Severity: HIGH 8.8
EPSS: EPSS 0.63 % · percentile 50 (2026-10-27)
State: PUBLISHED
Published: 2026-06-30
Updated: 2026-06-30
Assigner: NetScaler
NVD status: Analyzed

Description

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

Scores

Version	Score	Vector	Scored by
CVSS 4.0	HIGH 8.8	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:L	NetScaler
CVSS 4.0	HIGH 8.8	CVSS: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	NVD · 50a63c94-1ea7-4568-8c11-eb79e7c5a2b5 (Secondary)
CVSS 3.1	CRITICAL 9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	NVD · nvd@nist.gov (Primary)

Weaknesses (CWE)

CWE-119

European references

ENISA EUVD · EUVD-2026-40308
GCVE · GCVE-0-2026-8655

CERT-FR advisories

CERTFR-2026-AVI-0822 — Multiples vulnérabilités dans les produits Citrix · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:* < 13.1-37.272
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:ndcpp:*:*:* < 13.1-37.272
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:* ≥ 13.1 < 13.1-63.18
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:* ≥ 14.1 < 14.1-72.61
cpe:2.3:a:citrix:netscaler_application_delivery_controller:14.1-66.68:*:*:*:fips:*:*:*
cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:* ≥ 13.1 < 13.1-63.18
cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:* ≥ 14.1 < 14.1-72.61

Affected products

Product	Versions
NetScaler · ADC	affected 14.1 < 72.61 ; affected 13.1 < 63.18 ; affected 14.1 FIPS < 72.61 ; affected 13.1 FIPS and NDcPP < 37.272
NetScaler · Gateway	affected 14.1 < 72.61 ; affected 13.1 < 63.18

References

https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696604

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD