# 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.

- **Severity:** High 8.8 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 26 Aug 2025
- **Updated:** 27 Aug 2025
- **Also known as:** GHSA-rppg-589c-3659

## 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 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2025-7776?

It affects 2 products.


Products: 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.

## 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](https://insights.sbomify.com/CVE-2023-3519/): Citrix NetScaler ADC and NetScaler Gateway Code Injection (critical 9.8, exploited in the wild)
- [CVE-2026-88771](https://insights.sbomify.com/CVE-2026-88771/): Citrix NetScaler Improper Input Validation (critical 9.5, exploited in the wild)
- [CVE-2026-88772](https://insights.sbomify.com/CVE-2026-88772/): Citrix NetScaler Improper Restriction of Operations within the Bounds of a Memory Buffer (critical 9.5, exploited in the wild)
- [CVE-2023-4966](https://insights.sbomify.com/CVE-2023-4966/): Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow (critical 9.4, exploited in the wild)
- [CVE-2026-19490](https://insights.sbomify.com/CVE-2026-19490/): Citrix NetScaler Authentication Bypass Using an Alternate Path or Channel (critical 9.3, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-7776 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of CVE-2025-7776 in the wild and no public exploit code.

Affected product: NetScaler ADC. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-7776/ (Markdown: https://insights.sbomify.com/CVE-2025-7776/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-7776
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-7776
- OSV: https://osv.dev/vulnerability/CVE-2025-7776

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-7776/
Summaries are generated and may contain mistakes; the official description above is the record.