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Critical · 9.3 Public exploit CVE-2026-88773 EUVD-2026-87961GHSA-9x87-2c36-ffjf

HTTP Request Smuggling

Published Sep 27, 2026 · Updated Sep 29, 2026 · Assigned by NetScaler

Vendor: Citrix NetScaler Product: ADC Product: Gateway Category: Network devices

Description

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.

Affected products

VendorProductAffectedFixed
Citrix NetScaler ADC < 14.1-73.37, < 13.1-64.23, < 14.1-73.37 FIPS, < 13.1-37.279 and NDcPP 14.1-73.37
Citrix NetScaler Gateway < 14.1-73.37 FIPS, < 13.1-64.23 14.1-73.37 FIPS

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

Metasploit 1 module

GitHub 3 repositories

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Advisories 2

References