CVE-2026-8655
Critical
Description
Multiple Memory overflow vulnerabilities in NetScaler ADC and NetScaler Gateway leading to unpredictable or erroneous behavior and Denial of Service if NetScaler ADC is configured as an LB of type Oracle OR NetScaler ADC is configured as a DNS Proxy OR NetScaler ADC is configured as a DNS recursive resolver deployment
SeverityCritical
CVSS9.8
Exploit probability—
Product
Citrix Netscaler Application Delivery Controller
PublishedJun 30, 2026
First seenJun 30, 2026
Weakness typeCWE-119Memory buffer bounds error
How to fix
Update
- citrix netscaler_application_delivery_controller13.1-37.272, 13.1-63.18, 14.1-72.61 or later
- citrix netscaler_gateway13.1-63.18, 14.1-72.61 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| citrix netscaler_application_delivery_controller | v < 13.1-37.272, 13.1 ≤ v < 13.1-63.18, 14.1 ≤ v < 14.1-72.61, 14.1-66.68 | 13.1-37.272, 13.1-63.18, 14.1-72.61 |
| citrix netscaler_gateway | 13.1 ≤ v < 13.1-63.18, 14.1 ≤ v < 14.1-72.61 | 13.1-63.18, 14.1-72.61 |
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