Summary
generated automatically from NVD dataCVE-2026-88771 is an improper input validation flaw (CWE-20) in Citrix NetScaler ADC and NetScaler Gateway that lets an unauthenticated attacker execute arbitrary commands. It affects ADC releases before 14.1-73.37 and 13.1-64.23, plus certain FIPS and NDcPP builds, and Gateway releases before those same two versions. It is rated CRITICAL with a CVSS v3.1 score of 9.8 and is listed in the CISA KEV catalog, meaning it is actively exploited.
NVD 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.
⚠️ Actively exploited — CISA KEV
This CVE was added to CISA's Known Exploited Vulnerabilities catalog on 2026-09-27. It is confirmed exploited in the wild and must be patched as a priority.
Remediation deadline (US federal agencies): 2026-09-30
EPSS · FIRST.org
1.1%probability of exploitation in the next 30 days
Higher than 64% of scored CVEs
EPSS (Exploit Prediction Scoring System) estimates, from observed exploitation activity, how likely a CVE is to be exploited in the next 30 days. It complements CVSS, which measures severity, not likelihood. Score of 2026-10-16, recomputed daily by FIRST.org.
In-depth analysis on cveo.tech
We've published a detailed analysis of this CVE — exploitation, IOCs and mitigation.
CVSS v3.1 Score
Information
- Published
- 27 sept. 2026
- Updated
- 29 sept. 2026
- Status
- Analyzed
- Source
- 50a63c94-1ea7-4568-8c11-eb79e7c5a2b5
Affected products
Weaknesses (CWE)
References (2)
Similar CVEs
Other vulnerabilities of type CWE-20
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