CVE-2026-8655

What it is

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

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of service disruption.

Exploit odds

0.6% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-06-30 13:19 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-07-01 15:52 UTC Last updatedMost recent change to the record

Details

Published

2026-06-30 13:19 UTC

Last modified

2026-07-01 15:52 UTC

Exploit probability

0.6% · EPSS, next 30 days

Weakness

CWE-119 · Buffer errors

Record status

Analyzed

Affected

• Citrix Netscaler Application Delivery Controller < 13.1-37.272
• Citrix Netscaler Application Delivery Controller < 13.1-63.18
• Citrix Netscaler Application Delivery Controller < 14.1-72.61
• Citrix Netscaler Application Delivery Controller 14.1-66.68
• Citrix Netscaler Gateway < 13.1-63.18
• Citrix Netscaler Gateway < 14.1-72.61

Attack profile CVSS 4.0 · 8.8

Attack vector

Network

Complexity

Low

Attack requirements

None

Privileges needed

None

User interaction

None

Confidentiality

Low

Integrity

Low

Availability

High