CRITICAL CISA KEV

CVE-2026-88771

CVSS v3

9.8

CRITICAL

EPSS Score

1.0 %

exploit probability, as of 2026-09-28

CISA KEV

Yes

known exploited

Exploitation

—

SSVC status

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 Known Exploited Vulnerability

Date Added: 2026-09-27
Patch Due Date: 2026-09-30
Ransomware Use: Unknown

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2026-09-27
Last Modified: 2026-09-28
CERT-FR Advisory: CERTFR-2026-ALE-011
CERT-FR Link: CERTFR-2026-ALE-011

Frequently asked questions

What is CVE-2026-88771?

Is CVE-2026-88771 actively exploited?

Yes. CVE-2026-88771 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2026-09-30.

What is the CVSS score for CVE-2026-88771?

CVE-2026-88771 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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