CVE-2026-88771

A remote code execution vulnerability exists due to improper input validation, which can allow an unauthenticated attacker to execute arbitrary commands

At a glance

Severity: CRITICAL 9.5
Exploitation: Known exploited (CISA KEV) · added 2026-09-27
Exploited per ENISA since 2026-09-27
EPSS: EPSS 82.16 % · percentile 100 (2026-10-27)
State: PUBLISHED
Published: 2026-09-27
Updated: 2026-09-29
Assigner: NetScaler
NVD status: Analyzed

Description

Improper input validation vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway. This issue affects ADC: before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 FIPS, and before 13.1.37.279 FIPS and NDcPP; Gateway: before 14.1-73.37 and before 13.1-64.23 leading to an unauthenticated attacker to execute arbitrary commands.

Scores

Version	Score	Vector	Scored by
CVSS 4.0	CRITICAL 9.5	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H	NetScaler
CVSS 4.0	CRITICAL 9.5	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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-20

European references

ENISA EUVD · EUVD-2026-87958
GCVE · GCVE-0-2026-88771

CERT-FR advisories

CERTFR-2026-AVI-1235 — Multiples vulnérabilités dans Citrix NetScaler ADC et Gateway · cert.ssi.gouv.fr
CERTFR-2026-ALE-011 — Multiples vulnérabilités dans Citrix NetScaler ADC et Gateway · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:* ≥ 13.1 < 13.1-64.23
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:* ≥ 13.1 < 13.1.37.279
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:ndcpp:*:*:* ≥ 13.1 < 13.1.37.279
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:* ≥ 14.1 < 14.1-73.37
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:* ≥ 14.1-66.68 ≤ 14.1-73.37
cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:* ≥ 13.1 < 13.1-64.23
cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:* ≥ 14.1 < 14.1-73.37

Affected products

Product	Versions
Citrix NetScaler · ADC	affected 0 < 14.1-73.37 ; affected 0 < 13.1-64.23 ; affected 0 < 14.1-73.37 FIPS ; affected 0 < 13.1.37.279 FIPS and NDcPP
Citrix NetScaler · Gateway	affected 0 < 14.1-73.37 ; affected 0 < 13.1-64.23

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
CISA Known Exploited Vulnerabilities	CC0 1.0
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