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Vulnerability details

CVE-2026-88771

Actively exploited
Citrix NetScaler ADCCitrix NetScaler Gateway

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

CVSS 4.0
9.5Critical

Official 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 scores

ScoreVersionSourceVector
9.5Critical 4.0 CVEProject cvelistV5 (CNA) (NetScaler) 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

Affected products

VendorProductVersionsSource
Citrix NetScaler ADC v < 14.1-73.37 CVEProject cvelistV5 (CNA)
Citrix NetScaler ADC v < 13.1-64.23 CVEProject cvelistV5 (CNA)
Citrix NetScaler ADC v < 14.1-73.37 FIPS CVEProject cvelistV5 (CNA)
Citrix NetScaler ADC v < 13.1.37.279 FIPS and NDcPP CVEProject cvelistV5 (CNA)
Citrix NetScaler Gateway v < 14.1-73.37 CVEProject cvelistV5 (CNA)
Citrix NetScaler Gateway v < 13.1-64.23 CVEProject cvelistV5 (CNA)

References and advisories

2
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Details

Published
2026-09-27
Last updated
2026-09-29
State
Published
Assigner (CNA)
NetScaler
Kolun priority
79 · High

CISA KEV catalog

Date added
2026-09-27
Due date
2026-09-30
Used in ransomware
Unknown

Exploit prediction (EPSS)

81.89%
Probability of exploitation in 30 days
99.6%
Percentile (among all CVEs)
  • 2026-11-0581.89%
  • 2026-11-0483.2%
  • 2026-11-0382.16%

SSVC assessment (CISA)

Automatable
Yes
Exploitation
Active
Technical impact
Total

Weaknesses (CWE)

  • CWE-20
    Improper input validation