How severe is CVE-2026-19490?

CVE-2026-19490 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-19490 being actively exploited?

Yes. CVE-2026-19490 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2026-09-09, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2026-19490?

CVE-2026-19490 primarily affects Citrix Netscaler Application Delivery Controller. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-19490?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

When was CVE-2026-19490 published?

CVE-2026-19490 was published on 2026-08-19 and last updated on 2026-09-10.

CVE-2026-19490

CVE-2026-19490 is a critical-severity vulnerability in Citrix Netscaler Application Delivery Controller with a CVSS 3.x base score of 9.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2026-09-09). The underlying weakness is classified as CWE-288.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 9.3
EPSS exploit prediction: 6% (93rd percentile)
Actively exploited: Yes — listed in CISA KEV (added 2026-09-09)
Weakness: CWE-288
Affected product: Citrix Netscaler Application Delivery Controller
Published: 2026-08-19
Last modified: 2026-09-10

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.

Frequently asked questions

What is CVE-2026-19490?: 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.
How severe is CVE-2026-19490?: CVE-2026-19490 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-19490 being actively exploited?: Yes. CVE-2026-19490 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2026-09-09, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2026-19490?: CVE-2026-19490 primarily affects Citrix Netscaler Application Delivery Controller. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-19490?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
When was CVE-2026-19490 published?: CVE-2026-19490 was published on 2026-08-19 and last updated on 2026-09-10.

References

Affected products (4)

cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:*
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:ndcpp:*:*:*
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*
cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*

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