CVE-2026-88773CWE-444

CVE-2026-88773

Critical · published September 27, 2026

CVSS v3.1
10.0
EPSS
0%
Percentile
28.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
10.0 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
CVSS v4.0
9.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:H/SI:H/SA:N
EPSS
0.00361 · 28.7th percentile
Weakness
CWE-444 · Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Published
2026-09-27T21:16Z
Affected products (7)
ProductVersionsFixed in
citrix/netscaler_application_delivery_controller≥ 13.1, < 13.1-64.2313.1-64.23
citrix/netscaler_application_delivery_controller≥ 13.1, < 13.1.37.27913.1.37.279
citrix/netscaler_application_delivery_controller≥ 13.1, < 13.1.37.27913.1.37.279
citrix/netscaler_application_delivery_controller≥ 14.1, < 14.1-73.3714.1-73.37
citrix/netscaler_application_delivery_controller≥ 14.1-66.68, ≤ 14.1-73.37—
citrix/netscaler_gateway≥ 13.1, < 13.1-64.2313.1-64.23
citrix/netscaler_gateway≥ 14.1, < 14.1-73.3714.1-73.37
References (1)
https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697096 · 50a63c94-1ea7-4568-8c11-eb79e7c5a2b5
EPSS history
Timeline
  • 29 SEP 03:28Z
    EPSS moved — → 0%
    epss
  • 27 SEP 16:20Z
    HTTP Request Smuggling
    cvelistv5