CVE-2026-88777
Critical
Description
Memory overflow vulnerability 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 unpredictable or erroneous behavior or Denial of Service
SeverityCritical
CVSS9.8
Exploit probability—
Product
Citrix Netscaler Application Delivery Controller
PublishedSep 27, 2026
First seenSep 27, 2026
Weakness typeCWE-119Memory buffer bounds error
How to fix
Update
- citrix netscaler_application_delivery_controller13.1-64.23, 13.1.37.279, 14.1-73.37 or later
- citrix netscaler_gateway13.1-64.23, 14.1-73.37 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| citrix netscaler_application_delivery_controller | 13.1 ≤ v < 13.1-64.23, 13.1 ≤ v < 13.1.37.279, 14.1 ≤ v < 14.1-73.37, 14.1-66.68 ≤ v ≤ 14.1-73.37 | 13.1-64.23, 13.1.37.279, 14.1-73.37 |
| citrix netscaler_gateway | 13.1 ≤ v < 13.1-64.23, 14.1 ≤ v < 14.1-73.37 | 13.1-64.23, 14.1-73.37 |
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