CVE-2025-7775 — Memory overflow vulnerability leading to Remote Code Execution and/or Denial of Service…¶

Key facts

CVE-2025-7775 is a Critical (9.8) vulnerability: Memory overflow vulnerability leading to Remote Code Execution and/or Denial of Service…. This entry ships a detection-only PoC and a Docker test lab. It is on the CISA Known Exploited Vulnerabilities (KEV) catalog (added 2025-08-26), confirming active exploitation in the wild.

Actively exploited — on the CISA KEV catalog

CVE-2025-7775 is listed on the CISA Known Exploited Vulnerabilities (KEV) catalog (added 2025-08-26), confirming exploitation in the wild. Federal remediation deadline: 2025-08-28. Prioritise patching and deploy the detection and prevention rules below.


CVE	CVE-2025-7775
Severity	Critical (9.8)
CISA KEV	Actively exploited (added 2025-08-26)
Detection / prevention	—
PoC	poc.py
Source	2025/CVE-2025-7775/

Details¶

English | 한국어

Description¶

Memory overflow vulnerability leading to Remote Code Execution and/or Denial of Service in NetScaler ADC and NetScaler Gateway when NetScaler is configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server

(OR)

NetScaler ADC and NetScaler Gateway 13.1, 14.1, 13.1-FIPS and NDcPP: LB virtual servers of type (HTTP, SSL or HTTP_QUIC) bound with IPv6 services or servicegroups bound with IPv6 servers

(OR)

NetScaler ADC and NetScaler Gateway 13.1, 14.1, 13.1-FIPS and NDcPP: LB virtual servers of type (HTTP, SSL or HTTP_QUIC) bound with DBS IPv6 services or servicegroups bound with IPv6 DBS servers

(OR)

CR virtual server with type HDX

Vulnerability Details¶

Property	Value
CVE ID	CVE-2025-7775
Type	RCE
CVSS Score	9.8

Proof of Concept¶

Download¶

# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2025/CVE-2025-7775/poc.py

Usage¶

# Run PoC against target
python3 poc.py --target <TARGET_URL>

# With authentication
python3 poc.py --target <TARGET_URL> --username <USER> --password <PASS>

⚠️ Warning: This PoC is for authorized security testing only. It uses detection-only techniques and does not exploit or damage target systems.

Test Lab¶

This repository includes a Docker-based test environment with both vulnerable and patched applications.

Quick Start¶

# Clone and navigate to CVE directory
cd CVE-2025-7775

# Start both applications
docker-compose up -d

# Run tests
./run-tests.sh    # Linux/Mac
./run-tests.ps1   # Windows PowerShell

Application Endpoints¶

Application	URL	Status
Vulnerable App	http://localhost:8080	Shows vulnerability
Patched App	http://localhost:8081	Demonstrates fix

Directory Structure¶

├── README.md           # English documentation
├── README_KO.md        # Korean documentation
├── poc.py              # PoC detection script
├── docker-compose.yml  # Container orchestration
├── run-tests.sh        # Linux/Mac test runner
├── run-tests.ps1       # Windows test runner
├── vulnerable-app/     # Vulnerable version
│   ├── app.py
│   ├── Dockerfile
│   └── requirements.txt
└── patched-app/        # Fixed version
    ├── app.py
    ├── Dockerfile
    └── requirements.txt

References¶

https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX694938
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-7775

Generated by PoC Generator on 2026-06-24T05:12:32.51735073

Frequently asked questions¶

What is CVE-2025-7775?¶

CVE-2025-7775 is a Critical (9.8) vulnerability: Memory overflow vulnerability leading to Remote Code Execution and/or Denial of Service…. This entry ships a detection-only PoC and a Docker test lab. It is on the CISA Known Exploited Vulnerabilities (KEV) catalog (added 2025-08-26), confirming active exploitation in the wild.

How do I detect CVE-2025-7775?¶

Run the detection-only PoC included with this entry against your Docker test lab to confirm whether a target is affected; pair it with your own IDS logging.

How do I block or mitigate CVE-2025-7775?¶

Upgrade to a fixed version per the vendor advisory; the NVD record lists the affected versions. Use the included PoC to verify your remediation.

Is CVE-2025-7775 actively exploited?¶

Yes. CVE-2025-7775 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, added 2025-08-26, which means it has been exploited in the wild. CISA set a federal remediation deadline of 2025-08-28. Prioritise patching and deploy the detection and prevention rules above.

For authorized security testing and research only. See the full source and NVD record.