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9.5
CRITICAL CVSS 4.0
CVE-2026-107406
Memory overflow vulnerability leading to Remote Code Execution or Denial of Service
Overview
Description

Memory overflow vulnerability leading to Remote Code Execution or Denial of Service Vulnerability in NetScaler ADC. NetScaler ADC or NetScaler Gateway must be configured as a SAML SP or SAML IdP, subject to the following version-specific requirements:   * For the following versions: Applicable only when configured as a SAML IdP: * NetScaler ADC and NetScaler Gateway between 14.1-73.37 and 14.1-73.41, inclusive * NetScaler ADC 14.1-FIPS between 14.1-73.37 FIPS and 14.1-73.41 FIPS, inclusive * NetScaler ADC and NetScaler Gateway between 13.1-64.23 and 13.1-64.28, inclusive * NetScaler ADC 13.1-FIPS between 13.1-NDcPP 13.1-37.279 and 13.1- 37.282, inclusive   For the following versions: Applicable only when configured as a SAML SP or SAML IdP: * NetScaler ADC and NetScaler Gateway before 14.1-73.37  * NetScaler ADC 14.1-FIPS before 14.1-73.37 FIPS  * NetScaler ADC and NetScaler Gateway before 13.1-64.23 * NetScaler ADC 13.1-FIPS before13.1-NDcPP 13.1-37.279

Details
INFO

Published Date :

Oct. 8, 2026, 10:17 p.m.

Last Modified :

Oct. 10, 2026, 4:18 a.m.

Remotely Exploit :

Yes !

Source :

50a63c94-1ea7-4568-8c11-eb79e7c5a2b5
Impact
Affected Products

The following products are affected by CVE-2026-107406 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

No affected product recoded yet

: Total Affected Vendor : 0 | Products : 0
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 134c704f-9b21-4f2e-91b3-4a467353bcc0
CVSS 4.0 CRITICAL 50a63c94-1ea7-4568-8c11-eb79e7c5a2b5
CVSS 4.0 CRITICAL 50a63c94-1ea7-4568-8c11-eb79e7c5a2b5
Solution
Address memory overflow by updating NetScaler ADC/Gateway to a fixed version.
  • Update NetScaler ADC to a fixed version.
  • Update NetScaler Gateway to a fixed version.
  • Apply necessary patches or updates.
  • Reconfigure SAML settings if needed.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-107406.

URL Resource
https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697191
https://community.citrix.com/techzone-blogs/110_security-updates/protecting-customers-immediate-guidance-for-cve-2026-107406-in-netscaler-adc-and-netscaler-gateway-r1631/
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-107406 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-107406 weaknesses.

CAPEC-8: Buffer Overflow in an API Call Buffer Overflow in an API Call CAPEC-9: Buffer Overflow in Local Command-Line Utilities Buffer Overflow in Local Command-Line Utilities CAPEC-10: Buffer Overflow via Environment Variables Buffer Overflow via Environment Variables CAPEC-14: Client-side Injection-induced Buffer Overflow Client-side Injection-induced Buffer Overflow CAPEC-24: Filter Failure through Buffer Overflow Filter Failure through Buffer Overflow CAPEC-42: MIME Conversion MIME Conversion CAPEC-44: Overflow Binary Resource File Overflow Binary Resource File CAPEC-45: Buffer Overflow via Symbolic Links Buffer Overflow via Symbolic Links CAPEC-46: Overflow Variables and Tags Overflow Variables and Tags CAPEC-47: Buffer Overflow via Parameter Expansion Buffer Overflow via Parameter Expansion CAPEC-100: Overflow Buffers Overflow Buffers CAPEC-123: Buffer Manipulation Buffer Manipulation

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-107406 vulnerability anywhere in the article.

  • The Hacker News
Citrix Patches Critical NetScaler Flaw That Could Enable RCE in SAML Deployments

Citrix has released patches for yet another critical security flaw impacting NetScaler ADC and NetScaler Gateway that could result in remote code execution or denial-of-service (DoS) under certain con ... Read more

Published Date: Oct 09, 2026 (2 weeks, 6 days ago)
  • security.nl
Citrix waarschuwt voor nieuw lek dat remote code execution mogelijk maakt

Citrix waarschuwt voor een nieuwe kritieke kwetsbaarheid in Citrix NetScaler ADC en Citrix NetScaler Gateway die remote code execution mogelijk maakt en tot een denial of service kan leiden. Klanten w ... Read more

Published Date: Oct 09, 2026 (2 weeks, 6 days ago)
  • TheCyberThrone
Critical NetScaler RCE Vulnerability CVE-2026-107406

Executive SummaryCitrix has disclosed CVE-2026-107406, a critical memory overflow vulnerability affecting Citrix NetScaler ADC and NetScaler Gateway under specific SAML authentication configurations. ... Read more

Published Date: Oct 09, 2026 (2 weeks, 6 days ago)

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-107406 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Oct. 10, 2026

    Action Type Old Value New Value
    Removed SSVC {'id': 'CVE-2026-107406', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-10-09T12:52:20.488025Z'}
    Added SSVC {'id': 'CVE-2026-107406', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-10-09T00:00:00+00:00'}
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Oct. 09, 2026

    Action Type Old Value New Value
    Added CWE CWE-119
    Added Reference https://community.citrix.com/techzone-blogs/110_security-updates/protecting-customers-immediate-guidance-for-cve-2026-107406-in-netscaler-adc-and-netscaler-gateway-r1631/
    Added SSVC {'id': 'CVE-2026-107406', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-10-09T12:52:20.488025Z'}
  • New CVE Received by 50a63c94-1ea7-4568-8c11-eb79e7c5a2b5

    Oct. 08, 2026

    Action Type Old Value New Value
    Added Description Memory overflow vulnerability leading to Remote Code Execution or Denial of Service Vulnerability in NetScaler ADC. NetScaler ADC or NetScaler Gateway must be configured as a SAML SP or SAML IdP, subject to the following version-specific requirements:   * For the following versions: Applicable only when configured as a SAML IdP: * NetScaler ADC and NetScaler Gateway between 14.1-73.37 and 14.1-73.41, inclusive * NetScaler ADC 14.1-FIPS between 14.1-73.37 FIPS and 14.1-73.41 FIPS, inclusive * NetScaler ADC and NetScaler Gateway between 13.1-64.23 and 13.1-64.28, inclusive * NetScaler ADC 13.1-FIPS between 13.1-NDcPP 13.1-37.279 and 13.1- 37.282, inclusive   For the following versions: Applicable only when configured as a SAML SP or SAML IdP: * NetScaler ADC and NetScaler Gateway before 14.1-73.37  * NetScaler ADC 14.1-FIPS before 14.1-73.37 FIPS  * NetScaler ADC and NetScaler Gateway before 13.1-64.23 * NetScaler ADC 13.1-FIPS before13.1-NDcPP 13.1-37.279
    Added CVSS V4.0 AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
    Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/107xxx/CVE-2026-107406.json">CVE-2026-107406</a>
    Added Reference https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697191
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 9.5
Attack Vector
Attack Complexity
Attack Requirements
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VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability