CVE-2026-2683
📋 TL;DR
This CVE describes a path traversal vulnerability in Tsinghua Unigroup Electronic Archives System 3.2.210802(62532). Attackers can remotely exploit the /Using/Subject/downLoad.html file to read arbitrary files on the server by manipulating the 'path' parameter. Organizations using this specific version of the electronic archives system are affected.
💻 Affected Systems
- Tsinghua Unigroup Electronic Archives System
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete server compromise through reading sensitive files like configuration files, credentials, or database files, potentially leading to data exfiltration or further attacks.
Likely Case
Unauthorized access to sensitive files containing system information, user data, or configuration details that could facilitate additional attacks.
If Mitigated
Limited file access restricted by proper input validation and file system permissions, preventing access to critical system files.
🎯 Exploit Status
Public proof-of-concept code exists on GitHub, making exploitation straightforward for attackers with basic skills.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available. Vendor has not responded to disclosure. Consider upgrading to a newer version if available or implementing workarounds.
🔧 Temporary Workarounds
Web Application Firewall (WAF) Rules
allImplement WAF rules to block path traversal patterns in requests to /Using/Subject/downLoad.html
Access Restriction
allRestrict access to the vulnerable endpoint using network controls or authentication
🧯 If You Can't Patch
- Isolate the affected system from the internet and restrict internal access
- Implement strict file system permissions to limit what files the web application can access
🔍 How to Verify
Check if Vulnerable:
Test by accessing /Using/Subject/downLoad.html?path=../../../../etc/passwd (or equivalent Windows file) and checking if sensitive file contents are returnedCheck Version:
Check system documentation or web interface for version information showing 3.2.210802(62532)Verify Fix Applied:
Test the same path traversal attempts after implementing controls to confirm they are blocked📡 Detection & Monitoring
Log Indicators:
- HTTP requests to /Using/Subject/downLoad.html with '..' sequences in parameters
- Multiple failed file access attempts from single IP
Network Indicators:
- HTTP GET requests with path traversal patterns in query parameters
SIEM Query:
source="web_logs" AND uri_path="/Using/Subject/downLoad.html" AND (query="*..*" OR query="*../*")