CVE-2026-88771

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.

CVSS Metrics

• v4.0•CRITICAL•Score: 9.5CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
• v4.0•CRITICAL•Score: 9.5CVSS: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

Techniques & Countermeasures

• CWE-20•Improper Input Validation

  The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Affected Systems

• citrix netscaler•adc

  < 14.1-73.37 | < 13.1-64.23 | < 14.1-73.37 FIPS | < 13.1.37.279 FIPS and NDcPP

• citrix netscaler•gateway

  < 14.1-73.37 | < 13.1-64.23

References (2)

• https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697096
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-88771