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9.3
CRITICAL CVSS 4.0
CVE-2026-19490
NetScaler ADC and NetScaler Gateway Security Bulletin for CVE-2026-19490
Overview
Description

Vulnerability in NetScaler ADC and NetScaler Gateway. This issue affects ADC: from 14.1 through 73.32 and from 13.1 through 63.21; Gateway: from 14.1 through 73.32 and from 13.1 through 63.21.

Details
INFO

Published Date :

Aug. 19, 2026, 1:17 p.m.

Last Modified :

Sept. 1, 2026, 9:03 p.m.

Remotely Exploit :

Yes !

Source :

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

The following products are affected by CVE-2026-19490 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
Update NetScaler ADC and Gateway software to the latest versions.
  • Update NetScaler ADC to version 14.1 build 73.32 or later.
  • Update NetScaler ADC to version 13.1 build 63.21 or later.
  • Update NetScaler Gateway to version 14.1 build 73.32 or later.
  • Update NetScaler Gateway to version 13.1 build 63.21 or later.
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-2026-19490.

URL Resource
https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696939
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-19490 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-2026-19490 weaknesses.

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-2026-19490 vulnerability anywhere in the article.

  • security.nl
Kritiek beveiligingslek in Citrix NetScaler actief misbruikt bij aanvallen

Aanvallers maken actief misbruik van een kritieke kwetsbaarheid in Citrix NetScaler, zo waarschuwen het Belgische Centrum voor Cybersecurity (CCB) en cybersecuritybedrijf Previdian. Citrix kwam op 19 ... Read more

Published Date: Sep 07, 2026 (1 day, 18 hours ago)
  • The Cyber Express
The Cyber Express Weekly Roundup: Claude Session Hijacking, PaperCut Exploits, and Enterprise Cyberattacks

This weekly roundup highlights a range of cybersecurity developments affecting artificial intelligence platforms, enterprise software, healthcare organizations, social media accounts, and internet-fac ... Read more

Published Date: Sep 04, 2026 (4 days, 15 hours ago)
  • The Cyber Express
Two Citrix NetScaler Flaws Put Enterprise Edge Devices at Risk

Two Citrix NetScaler vulnerabilities affecting Citrix NetScaler Application Delivery Controller (ADC) and Citrix NetScaler Gateway products have prompted a patching warning for Australian organisation ... Read more

Published Date: Sep 04, 2026 (4 days, 20 hours ago)
  • TheCyberThrone
Critical NetScaler Security Update Patching Two Vulnerabilities

Cloud Software Group has released security updates for NetScaler ADC and NetScaler Gateway addressing two vulnerabilities, including a critical authentication-bypass flaw rated CVSS 9.3.The more serio ... Read more

Published Date: Aug 21, 2026 (2 weeks, 4 days ago)
  • security.nl
Kritiek Citrix NetScaler-lek kan aanvaller toegang tot systeem geven

Een kritieke kwetsbaarheid in Citrix NetScaler ADC en Citrix NetScaler Gateway kan ongeauthenticeerde aanvallers toegang tot het systeem geven. Er zijn beveiligingsupdates uitgebracht om het probleem ... Read more

Published Date: Aug 20, 2026 (2 weeks, 5 days ago)
  • The Hacker News
Critical NetScaler Flaw Can Bypass Authentication on Certain Gateway and AAA Servers

Citrix has released updates to address two security flaws impacting NetScaler ADC and NetScaler Gateway deployments, including a critical-severity authentication bypass vulnerability. According to the ... Read more

Published Date: Aug 20, 2026 (2 weeks, 5 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-2026-19490 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

    Aug. 20, 2026

    Action Type Old Value New Value
    Added CWE CWE-288
    Changed SSVC {'id': 'CVE-2026-19490', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-19T00:00:00+00:00'} {'id': 'CVE-2026-19490', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-20T03:56:10.740519Z'}
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Aug. 20, 2026

    Action Type Old Value New Value
    Added SSVC {'id': 'CVE-2026-19490', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-19T00:00:00+00:00'}
  • New CVE Received by 50a63c94-1ea7-4568-8c11-eb79e7c5a2b5

    Aug. 19, 2026

    Action Type Old Value New Value
    Added Affected [{'vendor': 'NetScaler', 'product': 'ADC', 'versions': [{'status': 'affected', 'version': '14.1', 'versionType': 'patch', 'lessThanOrEqual': '73.32'}, {'status': 'affected', 'version': '13.1', 'versionType': 'patch', 'lessThanOrEqual': '63.21'}], 'defaultStatus': 'unaffected'}, {'vendor': 'NetScaler', 'product': 'Gateway', 'versions': [{'status': 'affected', 'version': '14.1', 'versionType': 'patch', 'lessThanOrEqual': '73.32'}, {'status': 'affected', 'version': '13.1', 'versionType': 'patch', 'lessThanOrEqual': '63.21'}], 'defaultStatus': 'unaffected'}]
    Added Description Vulnerability in NetScaler ADC and NetScaler Gateway. This issue affects ADC: from 14.1 through 73.32 and from 13.1 through 63.21; Gateway: from 14.1 through 73.32 and from 13.1 through 63.21.
    Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/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 Reference https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696939
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: 9.3
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability