Main Vulnerability Database Vulnerabilities #VU153260

Buffer overflow in Citrix Netscaler ADC and Citrix NetScaler Gateway - CVE-2026-88779

Published: October 5, 2026

Vulnerability identifier: #VU153260

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-88779

CWE-ID: CWE-119

Exploitation vector: Remote access

Exploit availability: The vulnerability is being exploited in the wild

Vulnerability details

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to improper restriction of operations within the bounds of a memory buffer in SAML authentication functionality when processing SAML authentication data. A remote attacker can trigger the memory overflow to cause a denial of service.

The affected appliance must be configured as a SAML service provider or SAML identity provider.

Affected software

Citrix Netscaler ADC
Citrix NetScaler Gateway

How to mitigate CVE-2026-88779

Install security update from vendor's website.

Citrix Netscaler ADC - addressed in versions 13.1-37.282, 13.1-64.28, 14.1-73.41
Citrix NetScaler Gateway - addressed in versions 13.1-64.28, 14.1-73.41

External References

Related Security Bulletins