CVE-2026-88771
Citrix NetScaler · published 2026-09-27
Source record Collected from the National Vulnerability Database (NVD)
CISA Known Exploited Vulnerabilities
CISA lists this CVE as known exploited (added 2026-09-27).
- CISA's name for it: Citrix NetScaler Improper Input Validation Vulnerability
- CISA's description: Citrix NetScaler ADC and NetScaler Gateway contain an improper input validation vulnerability that could allow an unauthenticated attacker to execute arbitrary commands.
- Known ransomware campaign use, per CISA: Unknown
Source: CISA KEV catalog (CC0 1.0).
Description
Description by NetScaler via the CVE Program.
Improper input validation 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 leading to an unauthenticated attacker to execute arbitrary commands.
Filed by NetScaler; not a statement by Citrix NetScaler.
Status at the source
- NVD status: Analyzed
Affected products, as the source lists them
| Vendor | Product | Versions |
|---|---|---|
| Citrix NetScaler | ADC | 0 – before 14.1-73.37: affected 0 – before 13.1-64.23: affected 0 – before 14.1-73.37 FIPS: affected 0 – before 13.1.37.279 FIPS and NDcPP: affected |
| Citrix NetScaler | Gateway | 0 – before 14.1-73.37: affected 0 – before 13.1-64.23: affected |
Products named in NVD's CPE match criteria (2)
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*
DeSpy has not checked any unit, hardware revision or firmware. A product missing here is not a statement that it is unaffected.
Scores, as their sources published them
- CVSS 4.0: 9.5 CRITICAL — as published by NetScaler (Secondary)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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 - CVSS 3.1: 9.8 CRITICAL — as published by NIST (Primary)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - SSVC — CISA's assessment (SSVC 2.0.3, CISA Coordinator): Exploitation: active · Automatable: yes · Technical impact: total
DeSpy does not score records. These are the sources' own values.
Weaknesses
Sources
References the source lists
- https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697096
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-88771
Source dates: published 2026-09-27, last changed 2026-09-29. DeSpy's copy of this version is dated 2026-09-29.
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