Main Vulnerability Database Vulnerabilities #VU152266

Input validation error in Citrix Netscaler ADC and Citrix NetScaler Gateway - CVE-2026-88771

Published: September 27, 2026 / Updated: September 28, 2026

Vulnerability identifier: #VU152266

CSH Severity: Critical

CVSS v4: 10 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H]

CVE-ID: CVE-2026-88771

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: The vulnerability is being exploited in the wild

Vulnerability details

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to an unspecified issue. A remote non-authenticated attacker can send specially crafted requests to the affected system and execute arbitrary code.

Note, the vulnerability is being actively exploited in the wild as per watchTowr sources.

Affected software

Citrix Netscaler ADC
Citrix NetScaler Gateway

How to mitigate CVE-2026-88771

Install update from vendor's website.

Citrix Netscaler ADC - addressed in versions 13.1-37.279, 13.1-64.23, 14.1-73.37
Citrix NetScaler Gateway - addressed in versions 13.1-64.23, 14.1-73.37

External References

Related Security Bulletins