CVE-2026-88773
CRITICAL 9.3 PoC CATALOGUEDInconsistent 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.
A public PoC or exploit resource is catalogued. Review the linked source and affected versions below.
Exploitation likelihood
3.4%chance of exploitation in 30 days · 89th percentile
Impact if exploited
9.3CVSS 4.0 · CRITICAL
- ConfidentialityNone
- IntegrityHigh
- AvailabilityNone
What an attacker needs
- ✓Access: Reachable over the network — no local access needed
- ✓Privileges: No account or privileges required
- ✓User interaction: No user interaction needed
- ✓Complexity: No special conditions — reliably repeatable
- ✓Requirements: No special attack requirements
✓ lowers the bar for an attacker · ⚠ raises it
Proof of concept
Public PoC or exploit resources are catalogued below.
Listed by the named source; Vulnpedia has not tested these resources.
PoC data: JSON
Resource commands
curl -s https://vulnpedia.com/cve/CVE-2026-88773/poc.jsonMachine-readable PoC index for this CVE (for automation).Search for new PoCs
Search GitHub now — results may be empty or unverified.
Tracked sources are checked daily for recent CVEs, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.
Data snapshot:
Affected
Vendors Citrix Netscaler Citrix
Products Adc Gateway Netscaler Application Delivery Controller Netscaler Gateway
Weakness (CWE)
- CWE-444: Inconsistent interpretation of HTTP requests ('HTTP Request/Response smuggling')
CVSS vector
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
References and research data (JSON)
Unverified PoC candidates
Catalogue matches for further research. These repositories have not been validated as working exploits.
2 candidates
- https://github.com/Scyrix-LLC/CVE-2026-88773
CVE-2026-88773
PoC-in-GitHub · CVE-2026-88773
PoC-in-GitHub · CVE-2026-88773 · Updated 2026-10-09T14:45:10Z - https://github.com/CompleTetech-Security/netscaler-cve-2026-88773-check
Offline NetScaler ADC / Gateway evidence checker for CVE-2026-88773. Reported firmware and configuration evidence. Standalone Python; JSON/CSV/HTML reports; no exploit payloads.
PoC-in-GitHub · CVE-2026-88773
PoC-in-GitHub · CVE-2026-88773 · Updated 2026-10-26T05:04:01Z
Known Affected Software Configurations
| Vendor | Product | Version range |
|---|---|---|
| Citrix | Netscaler Application Delivery Controller | ≥ 13.1 and < 13.1-64.23 |
| Citrix | Netscaler Application Delivery Controller | ≥ 13.1 and < 13.1.37.279 |
| Citrix | Netscaler Application Delivery Controller | ≥ 13.1 and < 13.1.37.279 |
| Citrix | Netscaler Application Delivery Controller | ≥ 14.1 and < 14.1-73.37 |
| Citrix | Netscaler Application Delivery Controller | ≥ 14.1-66.68 and ≤ 14.1-73.37 |
| Citrix | Netscaler Gateway | ≥ 13.1 and < 13.1-64.23 |
| Citrix | Netscaler Gateway | ≥ 14.1 and < 14.1-73.37 |
All CVSS metrics
- CRITICAL 9.3 v4.0 · CNA Primary
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 - CRITICAL 9.3 v4.0 · NVD Secondary
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CRITICAL 10 v3.1 · NVD Primary
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
References
Advisories
- https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697096 CVE record · NetScaler · Updated 2026-09-27T16:20:08.382Z
NVD · CVE-2026-88773 · Updated 2026-09-29T16:17:13.370 - https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-87961 EUVD · EUVD-2026-87961