Out-of-bounds Read in Citrix Netscaler Application Delivery Controller
CVE-2026-8451
Insufficient input validation in NetScaler ADC and NetScaler Gateway leading to memory overread if NetScaler ADC or NetScaler Gateway is configured as a SAML IDP
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (40.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 40.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.157 · newest: 0.005 · change: -0.152
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-2026-8451?
- CVE-2026-8451 is a high-severity vulnerability in Citrix Netscaler Application Delivery Controller, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2026-06-30.
- How severe is CVE-2026-8451?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2026-8451 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.