Buffer overflow in Citrix Netscaler Application Delivery Controller
CVE-2025-7776
Memory overflow vulnerability leading to unpredictable or erroneous behavior and Denial of Service in NetScaler ADC and NetScaler Gateway when NetScaler is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) with PCoIP Profile bounded to it
Vulnerability class: Buffer Overflow
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.082 (94.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 94.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.069 · newest: 0.082 · change: +0.013
Affected products
- Citrix Netscaler Application Delivery Controller
- Citrix Netscaler Gateway
- Netscaler Adc — versions 14.1, 13.1, 13.1 FIPS and NDcPP
- Netscaler Gateway — versions 14.1, 13.1, 13.1 FIPS and NDcPP
Weakness classification (CWE)
Public proof-of-concept exploits
References
- support.citrix.com/support-home/kbsearch/article (Vendor Advisory)
Frequently asked questions
- What is CVE-2025-7776?
- CVE-2025-7776 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 2025-08-26.
- How severe is CVE-2025-7776?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2025-7776 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.