CVE-2026-88771

9.5 criticalKEVEPSS 82%

Critical (9.5) in Citrix NetScaler. In CISA KEV since 2026-09-27. EPSS 82% chance of exploitation in the next 30 days.

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.

Severity

CVSS 4.0

9.5 critical

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

CVSS 3.1

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 82% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-31)
CISA KEV: listed 2026-09-27, due 2026-09-30
CWE: CWE-20
Published: 2026-09-27
Modified: 2026-09-29
Record from: the NVD, synced 2026-10-19

Affected

citrix:netscaler_application_delivery_controller
citrix:netscaler_gateway

References

Check your stack JSON