Main Vulnerability Database Vulnerabilities #VU152297

Buffer overflow in Citrix Netscaler ADC and Citrix NetScaler Gateway - CVE-2026-88777

Published: September 28, 2026

Vulnerability identifier: #VU152297

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-2026-88777

CWE-ID: CWE-119

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to cause a denial of service or trigger unpredictable or erroneous behavior.

The vulnerability exists due to a memory overflow in LB/CS and CGNAT-LSN/NAT64 configurations when processing non-HTTP layer 7 protocol traffic. A remote attacker can send crafted input to cause a denial of service or trigger unpredictable or erroneous behavior.

The issue requires a non-HTTP layer 7 protocol feature to be enabled.

Affected software

Citrix Netscaler ADC
Citrix NetScaler Gateway

How to mitigate CVE-2026-88777

Install security update from vendor's website.

Citrix Netscaler ADC - addressed in versions 13.1-37.279, 13.1-64.23, 14.1-73.37
Citrix NetScaler Gateway - addressed in versions 13.1-64.23, 14.1-73.37

External References

Related Security Bulletins