CVE-2025-26349
📋 TL;DR
This vulnerability allows authenticated remote attackers to overwrite arbitrary files on Q-Free MaxTime systems by exploiting a relative path traversal flaw in the file upload mechanism. Attackers can potentially modify critical system files, configuration data, or upload malicious content. Organizations using Q-Free MaxTime version 2.11.0 or earlier are affected.
💻 Affected Systems
- Q-Free MaxTime
📦 What is this software?
Maxtime by Q Free
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through overwriting critical system files, installation of persistent backdoors, or service disruption by corrupting essential configuration files.
Likely Case
Unauthorized modification of application files, configuration tampering, or planting malicious scripts that could lead to further exploitation or data manipulation.
If Mitigated
Limited impact to non-critical files if proper file permission controls and input validation are implemented, though the vulnerability still exists.
🎯 Exploit Status
Exploitation requires authenticated access and knowledge of the target file system structure. No public exploit code is currently available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version > 2.11.0
Vendor Advisory: https://www.nozominetworks.com/labs/vulnerability-advisories-cve-2025-26349
Restart Required: No
Instructions:
1. Contact Q-Free for the latest patched version. 2. Backup current configuration and data. 3. Apply the vendor-provided patch or upgrade to version > 2.11.0. 4. Verify the fix by testing file upload functionality with path traversal attempts.
🔧 Temporary Workarounds
Restrict File Upload Permissions
allImplement strict file system permissions to limit what directories the web application can write to, preventing traversal to sensitive locations.
chmod 750 /var/www/html/uploads
chown www-data:www-data /var/www/html/uploads
Input Validation Filter
allImplement server-side validation to reject file upload requests containing path traversal sequences like '../' or absolute paths.
🧯 If You Can't Patch
- Implement network segmentation to isolate Q-Free MaxTime systems from critical infrastructure
- Deploy web application firewall (WAF) rules to block requests containing path traversal patterns
🔍 How to Verify
Check if Vulnerable:
Check the MaxTime version via the web interface or configuration files. If version is 2.11.0 or earlier, the system is vulnerable.Check Version:
Check web interface or consult system documentation for version informationVerify Fix Applied:
After patching, attempt to upload a file with path traversal sequences (e.g., '../../etc/passwd') and verify the request is rejected or fails.📡 Detection & Monitoring
Log Indicators:
- HTTP requests containing '../' sequences in file upload parameters
- Failed file upload attempts with unusual path patterns
- Unauthorized file modification events in system logs
Network Indicators:
- HTTP POST requests to upload endpoints with path traversal payloads
- Unusual file upload patterns from authenticated users
SIEM Query:
source="web_logs" AND (url="*upload*" AND (payload="*../*" OR payload="*..\\*"))