---
id: CVE-2026-88778
title: >-
  Predictable exact value from previous values 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…
summary: >-
  Predictable exact value from previous values 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…
severity: high
cvss: 8.8
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:L/SI:L/SA:L'
cwe:
  - CWE-342
vendor: Citrix NetScaler
product: ADC
affected:
  - ADC < 14.1-73.37
  - ADC < 13.1-64.23
  - ADC < 14.1-73.37 FIPS
  - ADC < 13.1.37.279 FIPS and NDcPP
  - Gateway < 14.1-73.37
  - Gateway < 13.1-64.23
published: '2026-09-27'
updated: '2026-09-27'
sourceUpdated: '2026-09-27T17:16:57.110'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-88778'
references:
  - url: >-
      https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697096
    label: 50a63c94-1ea7-4568-8c11-eb79e7c5a2b5
tags:
  - nvd
  - cve.org
cvssSource: cna
ingestedAt: '2026-09-27T16:55:23.212Z'
---

## Overview

Predictable exact value from previous values 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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.