Vulnerability in Citrix Netscaler Application Delivery Controller
CVE-2026-88773
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.
Vulnerability class: HTTP Request Smuggling
Published · last modified .
CVSS v3 metric
CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N.
EPSS exploit prediction
EPSS 0.031, 87.8th percentile (scored ); up from 0.004 30 days earlier. About EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.031 · change: +0.027
Affected products
Weakness classification (CWE)
Public exploits and proof-of-concept code
Metasploit modules
7 public repositories with exploit or proof-of-concept code for this CVE:
- Fyyre/CVE-2026-88773 (1 star, last pushed 2026-11-01): CVE-2026-88773 - NetScaler nsppe 32-bit chunk-size accumulator wrap (HTTP Request Smuggling)
- Scyrix-LLC/CVE-2026-88773 (1 star, last pushed 2026-10-02): CVE-2026-88773
- CompleTech-Security/netscaler-cve-2026-88773-check (last pushed 2026-10-26): Offline NetScaler ADC / Gateway evidence checker for CVE-2026-88773. Reported firmware and configuration evidence. Standalone Python; JSON/CSV/HTML reports; no exploit payloads.
- CompleteTech-Security/netscaler-cve-2026-88773-check (last pushed 2026-10-26): Offline NetScaler ADC / Gateway evidence checker for CVE-2026-88773. Reported firmware and configuration evidence. Standalone Python; JSON/CSV/HTML reports; no exploit payloads.
- CompleTetech-Security/netscaler-cve-2026-88773-check (last pushed 2026-10-26): Offline NetScaler ADC / Gateway evidence checker for CVE-2026-88773. Reported firmware and configuration evidence. Standalone Python; JSON/CSV/HTML reports; no exploit payloads.
- completetech-security/netscaler-cve-2026-88773-check (last pushed 2026-10-24): Standalone defensive checker project for CVE-2026-88773: Citrix NetScaler ADC / Gateway: HTTP request smuggling. One exploit per repository; implementation pending.
- CompleteTech-LLC/netscaler-cve-2026-88773-check (last pushed 2026-10-24): Standalone defensive checker project for CVE-2026-88773: Citrix NetScaler ADC / Gateway: HTTP request smuggling. One exploit per repository; implementation pending.
References
- support.citrix.com/support-home/kbsearch/article (Vendor Advisory)
This CVE has public exploit evidence. See the latest CVEs with public exploits.