CVE-2026-19490

Q: How do I fix CVE-2026-19490?

Published advisories record a fix for 2 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Q: Is CVE-2026-19490 being actively exploited?

Yes. CVE-2026-19490 is listed in the CISA Known Exploited Vulnerabilities catalog, which means exploitation has been observed in the wild. US federal agencies were required to remediate it by 2026-09-12. Treat it as a priority whatever its CVSS score says.

Q: How severe is CVE-2026-19490?

CVE-2026-19490 has a CVSS v3 base score of 9.8, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2026-19490 affect?

Published advisories record a fix for netscaler application delivery controller (NVD), netscaler gateway (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

CRITICALCISA KEVEPSS 92th pctl

9.8

CVSS v3

NVD

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.

CWE-288

How to fix

Remediation Available

netscaler application delivery controllerNVD

Affected:>= 13.1, < 13.1-37.277Fixed in:13.1-37.277CVE-2026-19490derived from NVD

Affected:>= 14.1, < 14.1-73.32Fixed in:14.1-73.32CVE-2026-19490derived from NVD

Affected:>= 13.1, < 13.1-63.21Fixed in:13.1-63.21CVE-2026-19490derived from NVD

netscaler gatewayNVD

Affected:>= 13.1, < 13.1-63.21Fixed in:13.1-63.21CVE-2026-19490derived from NVD

Affected:>= 14.1, < 14.1-73.32Fixed in:14.1-73.32CVE-2026-19490derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

5.60%probability of exploitation in 30 days

92ndpercentile

High risk: more likely to be exploited than 92% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Remediation due: 2026-09-12

References

Vendor Advisory1

support.citrix.com

Government Resource1

cisa.gov

Related Vulnerabilities

Other CWE-288 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-1709	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2023-42793	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2024-27198	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2025-4427	Medium	5.3	100%	KEV	Fix
CVE-2024-55591	Critical	9.8	98%	KEV + Ransom	Fix
CVE-2023-46747	Critical	9.8	97%	KEV + Ransom	-

Common questions

How do I fix CVE-2026-19490?

Published advisories record a fix for 2 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2026-19490 being actively exploited?

Yes. CVE-2026-19490 is listed in the CISA Known Exploited Vulnerabilities catalog, which means exploitation has been observed in the wild. US federal agencies were required to remediate it by 2026-09-12. Treat it as a priority whatever its CVSS score says.

How severe is CVE-2026-19490?

CVE-2026-19490 has a CVSS v3 base score of 9.8, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-19490 affect?

Published advisories record a fix for netscaler application delivery controller (NVD), netscaler gateway (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2026-19490

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This vulnerability is actively exploited in the wild

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-09-10.