CVE-2025-7776 Memory overflow vulnerability leading to unpredictable or erroneous behavior and Denial of Service
Attackers can cause denial of service and unpredictable behavior in NetScaler Gateway via memory overflow when PCoIP profiles are configured.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-7776?
CVE-2025-7776 is a high-severity memory corruption vulnerability in NetScaler ADC, published on 26 Aug 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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
Weakness: CWE-119
Which versions are affected by CVE-2025-7776?
It affects 2 products.
Products include Citrix NetScaler ADC, Citrix Netscaler Gateway.
How do I fix CVE-2025-7776?
No fix has been published for CVE-2025-7776 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-7776 being exploited?
There is no known exploitation of CVE-2025-7776 in the wild and no public exploit code.
Other vulnerabilities in NetScaler ADC
- CVE-2023-3519 Citrix NetScaler ADC and NetScaler Gateway Code Injection
- CVE-2026-88771 Citrix NetScaler Improper Input Validation
- CVE-2026-88772 Citrix NetScaler Improper Restriction of Operations within the Bounds of a Memory Buffer
- CVE-2023-4966 Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow
- CVE-2026-19490 Citrix NetScaler Authentication Bypass Using an Alternate Path or Channel
Sources
Also known as GHSA-rppg-589c-3659.