CVE-2026-107406: Memory overflow vulnerability leading to Remote Code Execution or Denial of Service

Is it exploited?

Not on CISA's list. CISA has not added it to the Known Exploited Vulnerabilities catalog as of 30 Oct 2026. If CISA adds it, this page shows it as known exploited.

How likely is exploitation in the next 30 days?

1.9%

Up from 0.5% on 24 Oct 2026.

EPSS score, percentile 79.4 of all scored records. A probability estimated by FIRST, not a report of exploitation.

How severe?

9.5 Critical

CVSS v4.0 base score, given by the CNA

What should I do?

CISA has set no required action, because the vulnerability is not in KEV.

The CVE record links no vendor advisory, patch or mitigation.

Which versions are affected?

Affected

• before 14.1-73.46
• before 13.1-64.29
• before 14.1-73.46 FIPS
• before 13.1.37.283 FIPS
• before 14.1-73.46
• before 13.1-64.29

Versions by product

Source: CISA KEV 2026.10.30, as of 30 Oct 2026; FIRST EPSS, as of 31 Oct 2026; CVE List, as of 31 Oct 2026. About the data.

Description

Memory overflow vulnerability leading to Remote Code Execution or Denial of Service

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

Source: CVE List, as of 31 Oct 2026. About the data.

What to do

Advisories and patches

The CVE record links no vendor advisory, patch or mitigation.

This summary is based on the CVE record as of 31 Oct 2026. Check the vendor's advisory before you act: affected versions and fixes can change.

Affected products and versions

Source: CVE List, as of 31 Oct 2026. About the data.

Timeline