TCP Initial Sequence Number (ISN) prediction (Citrix NetScaler ADC)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.69 % · percentile 53 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- NetScaler
- NVD status
- Analyzed
Description
Predictable exact value from previous values 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 FIPS and NDcPP; Gateway: before 14.1-73.37 and before 13.1-64.23.
Weaknesses (CWE)
- CWE-342 — Predictable Exact Value from Previous Values
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 4.0 | HIGH 8.8 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:L/SI:L/SA:L | NetScaler |
| CVSS 4.0 | HIGH 8.8 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:L/SI:L/SA:L/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 | NVD · 50a63c94-1ea7-4568-8c11-eb79e7c5a2b5 (Secondary) |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2026-87973
- GCVE · GCVE-0-2026-88778
CERT-FR advisories
- CERTFR-2026-AVI-1235 — Multiples vulnérabilités dans Citrix NetScaler ADC et Gateway · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*≥ 13.1 < 13.1-64.23cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:*≥ 13.1 < 13.1.37.279cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:ndcpp:*:*:*≥ 13.1 < 13.1.37.279cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*≥ 14.1 < 14.1-73.37cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:*≥ 14.1-66.68 ≤ 14.1-73.37cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*≥ 13.1 < 13.1-64.23cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*≥ 14.1 < 14.1-73.37
Affected products
| Product | Versions |
|---|---|
| Citrix NetScaler · ADC | affected 0 < 14.1-73.37 ; affected 0 < 13.1-64.23 ; affected 0 < 14.1-73.37 FIPS ; affected 0 < 13.1.37.279 FIPS and NDcPP |
| Citrix NetScaler · Gateway | affected 0 < 14.1-73.37 ; affected 0 < 13.1-64.23 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |