---
id: CVE-2026-107409
title: >-
  Memory corruption in DNS-over-HTTPS (DoH) can lead to unpredictable or
  erroneous behavior or a Denial of Service in NetScaler ADC and NetScaler
  Gateway
summary: >-
  Memory corruption in DNS-over-HTTPS (DoH) can lead to unpredictable or
  erroneous behavior or a Denial of Service in NetScaler ADC and NetScaler
  Gateway.
severity: critical
cvss: 9.3
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'
cvssSource: cna
vendor: Citrix NetScaler
product: ADC
affected:
  - ADC < 14.1-73.57
  - ADC < 13.1-64.39
  - ADC < 14.1-73.58 FIPS
  - ADC < 13.1-37.293 FIPs and NDcPP
  - Gateway < 14.1-73.57
  - Gateway < 13.1-64.39
published: '2026-11-13'
updated: '2026-11-13'
sourceUpdated: '2026-11-13T02:05:45.195Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-107409'
references:
  - url: >-
      https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697305
tags:
  - cve.org
ingestedAt: '2026-11-13T02:19:56.906Z'
---

## Overview

Memory corruption in DNS-over-HTTPS (DoH) can lead to unpredictable or erroneous behavior or a Denial of Service in NetScaler ADC and NetScaler Gateway.

## Affected

- `ADC < 14.1-73.57`
- `ADC < 13.1-64.39`
- `ADC < 14.1-73.58 FIPS`
- `ADC < 13.1-37.293 FIPs and NDcPP`
- `Gateway < 14.1-73.57`
- `Gateway < 13.1-64.39`

## Remediation

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