CVE-2026-88771 KEV
9.8
CRITICAL · CVSS 3.1 · EPSS 81.9% (pctl 100)
Patch first
On CISA KEV — known exploited in the wild, due 2026-09-30.
Description
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.
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 81.89% — more likely to be exploited than 100% of all CVEs |
| Weakness | CWE-20 |
| On CISA KEV | yes — remediate by 2026-09-30 |
| Public exploit | none known |
| Published | 2026-09-27 |
| Last modified | 2026-09-29 |
CISA KEV
| Name | Citrix NetScaler Improper Input Validation Vulnerability |
|---|---|
| Added | 2026-09-27 |
| Due | 2026-09-30 |
| Vendor / product | Citrix / NetScaler |
| Ransomware use | none reported |
Affected (2)
| Vendor | Product |
|---|---|
| citrix | netscaler application delivery controller |
| citrix | netscaler gateway |
References
→ the Explorer · watch your stack · NVD