CVE-2025-6810
📋 TL;DR
This vulnerability in Mescius ActiveReports.NET allows remote attackers to execute arbitrary code by exploiting insecure deserialization in the ReadValue method. Any application using the vulnerable library with untrusted data input is affected. Attackers can achieve remote code execution with high privileges.
💻 Affected Systems
- Mescius ActiveReports.NET
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining full control over the server, data exfiltration, lateral movement, and persistent backdoor installation.
Likely Case
Remote code execution leading to application compromise, data theft, and potential ransomware deployment.
If Mitigated
Limited impact with proper network segmentation and input validation, potentially only denial of service.
🎯 Exploit Status
ZDI-CAN-25246 indicates proof-of-concept exists. CVSS 9.8 suggests trivial exploitation with high impact. Attack vectors depend on application implementation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Mescius security advisory for specific patched version
Vendor Advisory: https://www.mescius.com/support/security-advisories
Restart Required: Yes
Instructions:
1. Check Mescius security advisory for CVE-2025-6810
2. Download and install the patched version of ActiveReports.NET
3. Restart affected applications and services
4. Test functionality after patch application
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement strict input validation to prevent malicious serialized data from reaching ReadValue method
Network Segmentation
allRestrict network access to applications using ActiveReports.NET
🧯 If You Can't Patch
- Implement application-level input validation and sanitization for all data processed by ActiveReports.NET
- Use network segmentation and firewalls to restrict access to vulnerable applications
🔍 How to Verify
Check if Vulnerable:
Check application dependencies for ActiveReports.NET version and compare against vendor patched versionsCheck Version:
Check application manifest or dependency files for ActiveReports.NET version informationVerify Fix Applied:
Verify ActiveReports.NET version matches or exceeds patched version from vendor advisory📡 Detection & Monitoring
Log Indicators:
- Unusual process creation from application using ActiveReports.NET
- Error logs related to deserialization failures
- Unexpected network connections from application process
Network Indicators:
- Unusual outbound connections from application server
- Traffic patterns indicating data exfiltration
SIEM Query:
Process creation where parent process contains 'ActiveReports' AND command line contains unusual parameters