CVE-2025-63207
📋 TL;DR
This vulnerability allows unauthenticated attackers to change all user passwords (Admin, Operator, User) on R.V.R Elettronica TEX devices by sending a POST request to the /_Passwd.html endpoint. This results in complete system compromise and potential loss of control. Organizations using affected TEX products with vulnerable firmware are at risk.
💻 Affected Systems
- R.V.R Elettronica TEX product
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system takeover: attacker changes all passwords, locks out legitimate users, gains administrative control, and could disrupt industrial operations or use the device as an attack pivot point.
Likely Case
Unauthorized password changes leading to denial of service (legitimate users locked out) and potential configuration changes if attacker gains access.
If Mitigated
Limited impact if network segmentation prevents external access and strong authentication controls are in place elsewhere.
🎯 Exploit Status
Exploit requires only a single HTTP POST request with password parameters. Public GitHub repository contains proof-of-concept.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.rvr.it/en/
Restart Required: No
Instructions:
1. Check vendor website for security advisories. 2. If patch available, download from vendor portal. 3. Apply firmware update following vendor instructions. 4. Verify update was successful.
🔧 Temporary Workarounds
Network Access Control
allRestrict network access to TEX devices to only authorized management networks
Web Interface Disable
allDisable web GUI if not required for operations
🧯 If You Can't Patch
- Isolate TEX devices in separate VLAN with strict firewall rules allowing only necessary traffic
- Implement network monitoring for POST requests to /_Passwd.html endpoint
🔍 How to Verify
Check if Vulnerable:
Send POST request to http://[device-ip]/_Passwd.html with password parameters. If it changes passwords without authentication, device is vulnerable.Check Version:
Check device web interface or console for firmware version TEXL-000400 and GUI version TLAN-000400Verify Fix Applied:
Attempt the same POST request after remediation - should return authentication error or 403 Forbidden.📡 Detection & Monitoring
Log Indicators:
- HTTP POST requests to /_Passwd.html endpoint
- Password change events without prior authentication
Network Indicators:
- HTTP POST to /_Passwd.html from unauthorized IPs
- Unusual password reset patterns
SIEM Query:
source="web_logs" AND url="/_Passwd.html" AND method="POST"