CVE-2025-32756 — A stack-based buffer overflow vulnerability [CWE-121] vulnerability in Fortinet…¶
Key facts
CVE-2025-32756 is a Critical (9.8) vulnerability: A stack-based buffer overflow vulnerability [CWE-121] vulnerability in Fortinet…. This entry ships a detection-only PoC and a Docker test lab. It is on the CISA Known Exploited Vulnerabilities (KEV) catalog (added 2025-05-14), confirming active exploitation in the wild.
Actively exploited — on the CISA KEV catalog
CVE-2025-32756 is listed on the CISA Known Exploited Vulnerabilities (KEV) catalog (added 2025-05-14), confirming exploitation in the wild. Federal remediation deadline: 2025-06-04. Prioritise patching and deploy the detection and prevention rules below.
| CVE | CVE-2025-32756 |
| Severity | Critical (9.8) |
| CISA KEV | Actively exploited (added 2025-05-14) |
| Detection / prevention | — |
| PoC | poc.py |
| Source | 2025/CVE-2025-32756/ |
Details¶
English | 한국어
Description¶
A stack-based buffer overflow vulnerability [CWE-121] vulnerability in Fortinet FortiCamera 2.1.0 through 2.1.3, FortiCamera 2.0 all versions, FortiCamera 1.1 all versions, FortiMail 7.6.0 through 7.6.2, FortiMail 7.4.0 through 7.4.4, FortiMail 7.2.0 through 7.2.7, FortiMail 7.0.0 through 7.0.8, FortiNDR 7.6.0, FortiNDR 7.4.0 through 7.4.7, FortiNDR 7.2.0 through 7.2.4, FortiNDR 7.0.0 through 7.0.6, FortiRecorder 7.2.0 through 7.2.3, FortiRecorder 7.0.0 through 7.0.5, FortiRecorder 6.4.0 through 6.4.5, FortiVoice 7.2.0, FortiVoice 7.0.0 through 7.0.6, FortiVoice 6.4.0 through 6.4.10 allows a remote unauthenticated attacker to execute arbitrary code or commands via sending HTTP requests with specially crafted hash cookie.
Vulnerability Details¶
| Property | Value |
|---|---|
| CVE ID | CVE-2025-32756 |
| 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-2025-32756/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-2025-32756
# 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://fortiguard.fortinet.com/psirt/FG-IR-25-254
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-32756
Generated by PoC Generator on 2026-06-24T07:13:26.936207157
Frequently asked questions¶
What is CVE-2025-32756?¶
CVE-2025-32756 is a Critical (9.8) vulnerability: A stack-based buffer overflow vulnerability [CWE-121] vulnerability in Fortinet…. This entry ships a detection-only PoC and a Docker test lab. It is on the CISA Known Exploited Vulnerabilities (KEV) catalog (added 2025-05-14), confirming active exploitation in the wild.
How do I detect CVE-2025-32756?¶
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-2025-32756?¶
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-2025-32756 actively exploited?¶
Yes. CVE-2025-32756 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, added 2025-05-14, which means it has been exploited in the wild. CISA set a federal remediation deadline of 2025-06-04. Prioritise patching and deploy the detection and prevention rules above.
For authorized security testing and research only. See the full source and NVD record.