Exploit for CVE-2026-26235

## https://sploitus.com/exploit?id=7D4CBE6B-5EED-5852-9418-05EE9D4EEDF1
## 👤 Author

**Mohammed Idrees Banyamer**
- 📍 **Country:** Jordan
- 📸 **Instagram:** [@banyamer_security](https://instagram.com/banyamer_security)
  
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![Python](https://img.shields.io/badge/python-3.6%2B-blue)
![Version](https://img.shields.io/badge/JUNG%20Smart%20Visu%20Server-%3C%3D1.1.1050-red)
![CVE](https://img.shields.io/badge/CVE-2026--26235-brightgreen)
![CVSS](https://img.shields.io/badge/CVSS-8.7-high)
![CWE](https://img.shields.io/badge/CWE-306-orange)
![Author](https://img.shields.io/badge/Author-@banyamer_security-orange)

**Proof-of-Concept exploit for CVE-2026-26235** - Unauthenticated Denial of Service via missing authentication in **JUNG Smart Visu Server ≤ 1.1.1050**.

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## 🚨 Vulnerability Description

**CVE-2026-26235** is an unauthenticated denial of service vulnerability in **JUNG Smart Visu Server** versions ≤ 1.1.1050. The product fails to implement authentication for critical system management functions, allowing remote attackers to reboot or shut down the server with a single POST request.

The endpoints `/cgi-bin/reboot.sh` and `/cgi-bin/shutdown.sh` are exposed without any authentication checks. No session tokens, API keys, or credentials are required to trigger these system-level commands.

This allows:
- **Unauthenticated system reboot/shutdown**
- **No user interaction required**
- **Complete service disruption**
- **Persistent denial of service**

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## 🎯 Affected Versions

| Status | Version |
|--------|---------|
| ❌ **Vulnerable** | JUNG Smart Visu Server ≤ 1.1.1050 |
| ✅ **Patched** | Not yet released |

**Tested on:** JUNG Smart Visu Server 1.1.1050, Embedded Linux

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## 💥 Impact

| Vector | Description |
|--------|-------------|
| **CVSS v4** | 8.7 (High) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| **Authentication** | None - Completely unauthenticated |
| **Attack Vector** | Network |
| **Complexity** | Low |
| **Impact** | High Availability Impact |

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## 🔬 Technical Details

### Root Cause
1. **Missing authentication** - CWE-306: The product does not perform any authentication for critical system functions
2. **Exposed CGI endpoints** - `/cgi-bin/reboot.sh` and `/cgi-bin/shutdown.sh` are publicly accessible
3. **No session validation** - No cookie, token, or credential verification occurs
4. **Direct system command execution** - CGI scripts execute system reboot/shutdown commands without privilege checks

### Vulnerability Flow
```
Attacker → POST /cgi-bin/reboot.sh → No Authentication Check → System Reboot → DoS
Attacker → POST /cgi-bin/shutdown.sh → No Authentication Check → System Shutdown → DoS
```

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## 🛠️ Proof of Concept

### Python Exploit Script
```python
#!/usr/bin/env python3
# Exploit Title: JUNG Smart Visu Server - Unauthenticated Remote Reboot/Shutdown
# CVE: CVE-2026-26235
# Date: 2026-02-12
# Exploit Author: Mohammed Idrees Banyamer
# Author Country: Jordan
# Instagram: @banyamer_security
# Author GitHub: https://github.com/banyamer-security
# Vendor Homepage: https://www.jung.de
# Software Link: https://www.jung.de/smart-visu-server
# Vulnerable: JUNG Smart Visu Server 
  Responsible Disclosure • Security Research • CVE-2026-26235