CVE-2026-88771: CWE-20 Improper input validation in Citrix NetScaler ADC
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.
AI Analysis
Technical Summary
This vulnerability in Citrix NetScaler ADC and Gateway arises from improper input validation, enabling unauthenticated attackers to execute arbitrary commands. Affected versions include ADC versions before 14.1-73.37 and 13.1-64.23, including FIPS and NDcPP variants, and Gateway versions before 14.1-73.37 and 13.1-64.23. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability.
Potential Impact
An unauthenticated attacker can exploit this vulnerability to execute arbitrary commands on vulnerable Citrix NetScaler ADC and Gateway devices. This can lead to full compromise of the affected system, impacting confidentiality, integrity, and availability of the service.
Mitigation Recommendations
A fix is available in versions 14.1-73.37 and 13.1-64.23 and later. Users should upgrade to these or later versions to remediate the vulnerability. Since this is not a cloud service, remediation depends on applying the vendor's official patches. Patch status is confirmed by the affected version ranges indicating fixed versions.
CVE-2026-88771: CWE-20 Improper input validation in Citrix NetScaler ADC
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 v4.0
Score 9.5critical
Affected software
Citrix NetScaler
ADC
Citrix NetScaler
Gateway
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Citrix NetScaler ADC and Gateway arises from improper input validation, enabling unauthenticated attackers to execute arbitrary commands. Affected versions include ADC versions before 14.1-73.37 and 13.1-64.23, including FIPS and NDcPP variants, and Gateway versions before 14.1-73.37 and 13.1-64.23. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability.
Potential Impact
An unauthenticated attacker can exploit this vulnerability to execute arbitrary commands on vulnerable Citrix NetScaler ADC and Gateway devices. This can lead to full compromise of the affected system, impacting confidentiality, integrity, and availability of the service.
Mitigation Recommendations
A fix is available in versions 14.1-73.37 and 13.1-64.23 and later. Users should upgrade to these or later versions to remediate the vulnerability. Since this is not a cloud service, remediation depends on applying the vendor's official patches. Patch status is confirmed by the affected version ranges indicating fixed versions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- NetScaler
- Date Reserved
- 2026-09-10T07:14:57.369Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ab9455ef7a7c5410638dcf9
Added to database: 09/27/2026, 16:33:34 UTC
Last enriched: 09/27/2026, 16:47:57 UTC
Last updated: 09/28/2026, 02:46:52 UTC
Views: 46
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