Buffer overflow in Citrix Netscaler Application Delivery Controller
CVE-2026-8452
Memory overflow vulnerability NetScaler ADC and NetScaler Gateway leading to unpredictable or erroneous behavior and Denial of Service if the appliance is configured as a Gateway (SSL VPN, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server
Vulnerability class: Buffer Overflow
EPSS: 0.005 (39.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Citrix Netscaler_application_delivery_controller — versions 14.1-66.68
- Citrix Netscaler_gateway
- Netscaler Adc — versions 14.1, 13.1, 14.1 FIPS
- Netscaler Gateway — versions 14.1, 13.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- 50a63c94-1ea7-4568-8c11-eb79e7c5a2b5 (Vendor Advisory)
Frequently asked questions
- What is CVE-2026-8452?
- CVE-2026-8452 is a critical-severity vulnerability in Citrix Netscaler Application Delivery Controller, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2026-06-30.
- How severe is CVE-2026-8452?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2026-8452 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.