CVE-2026-8655: Multiple Memory overflow vulnerabilities leading to unpredictable or erroneous behavior and Denial of Service
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
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Compensating control
If applicable, avoid/alter the NetScaler ADC configurations mentioned in the material to reduce exposure: (1) configure NetScaler ADC as an LB of type Oracle, or (2) configure NetScaler ADC as a DNS Proxy, or (3) configure NetScaler ADC as a DNS recursive resolver deployment.
Event History
Frequently Asked Questions
What is the severity of CVE-2026-8655?
CVE-2026-8655 has a risk rating of 45.
How do I fix CVE-2026-8655?
To mitigate CVE-2026-8655, ensure you update your Citrix NetScaler ADC and NetScaler Gateway to the latest patched versions.
What causes CVE-2026-8655?
CVE-2026-8655 is caused by multiple memory overflow vulnerabilities in the Citrix NetScaler products.
What systems are affected by CVE-2026-8655?
CVE-2026-8655 affects Citrix NetScaler ADC and Citrix NetScaler Gateway when configured as an LB of type Oracle, DNS Proxy, or DNS Recursive.
What are the potential impacts of CVE-2026-8655?
The potential impacts of CVE-2026-8655 include unpredictable or erroneous behavior and Denial of Service.