Citrix Netscaler Application Delivery Controller — CVE-2026-88773 (Critical)

Date Sep 27, 2026

Type Vendor advisory

Signal Critical vendor advisory

Vendor / Product Citrix · Netscaler Application Delivery Controller

CVE CVE-2026-88773

Critical vendor advisory CVE-2026-88773

Summary

Inconsistent interpretation of HTTP requests ('HTTP Request/Response smuggling') vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway. This issue affects ADC: before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 FIPS, and before 13.1-37.279 and NDcPP; Gateway: before 14.1-73.37 FIPS and before 13.1-64.23.

Why it matters

This CVE carries a CRITICAL severity rating (CVSS 10.0) in Citrix Netscaler Application Delivery Controller. Patch or mitigate promptly.

Operator check

Review CVE-2026-88773 in your asset inventory. Apply patches per vendor guidance and verify Netscaler Application Delivery Controller is not exposed. CVSS score: 10.0.

Sources

NVD — CVE-2026-88773 Source reference

PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.

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