# CVE-2026-88771: A remote code execution vulnerability exists due to improper input validation, which can allow an unauthenticated attacker to execute arbitrary commands

> CVE-2026-88771: A remote code execution vulnerability exists due to improper input validation, which can allow an unauthenticated attacker to execute arbitrary commands. CVSS 9.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2026-88771
Last updated: 2026-09-29T04:18:01Z

- Published: 2026-09-27 16:02 UTC · Updated: 2026-09-29 04:18 UTC · Assigner: NetScaler
- CVSS: 9.8 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS: 82.2%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2026-09-27, federal due date 2026-09-30, ransomware use: Unknown
- CWE: CWE-20

## 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.

## CISA required action

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

## Affected vendors and products

- Citrix NetScaler: ADC
- Citrix NetScaler: Gateway

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-88771)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-88771)
- [https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697096](https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697096)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-88771 · Markdown: https://rewindex.com/cve/CVE-2026-88771.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-88771 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:09:00.008Z