CVE-2025-55704
📋 TL;DR
A hidden functionality vulnerability in Brother MFP devices allows attackers to access device logs containing sensitive information. This affects multiple Brother multi-function printers with exposed management interfaces. Organizations using these devices for printing, scanning, or fax operations are potentially impacted.
💻 Affected Systems
- Brother MFP (Multi-Function Printer) devices
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Attackers could extract sensitive information from logs including user credentials, document metadata, network configurations, and potentially authentication tokens, leading to further network compromise.
Likely Case
Unauthorized access to device logs containing user activity, document names, network information, and potentially limited system information that could aid in reconnaissance for further attacks.
If Mitigated
With proper network segmentation and access controls, impact is limited to isolated printer network segments with minimal sensitive data exposure.
🎯 Exploit Status
Exploitation likely involves accessing hidden endpoints or functionality in the web interface. No public exploit code identified in references.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Brother support site for specific firmware updates
Vendor Advisory: https://faq.brother.co.jp/app/answers/detail/a_id/13716
Restart Required: Yes
Instructions:
1. Visit Brother support website 2. Identify your MFP model 3. Download latest firmware 4. Apply firmware update via web interface or USB 5. Reboot device
🔧 Temporary Workarounds
Network Segmentation
allIsolate MFP devices on separate VLAN with restricted access
Disable Web Interface
allTurn off web management interface if not required for operations
🧯 If You Can't Patch
- Implement strict network access controls to limit MFP management interface access to authorized IPs only
- Regularly monitor and review MFP access logs for unauthorized access attempts
🔍 How to Verify
Check if Vulnerable:
Check if Brother MFP web interface is accessible and test for hidden log access functionalityCheck Version:
Access MFP web interface > System Settings > Firmware VersionVerify Fix Applied:
Verify firmware version matches patched version from vendor advisory and test log access functionality📡 Detection & Monitoring
Log Indicators:
- Unusual access to MFP web interface
- Multiple failed authentication attempts to printer management
- Access to log-related endpoints from unauthorized sources
Network Indicators:
- HTTP requests to printer IP on management ports (typically 80, 443, 8080)
- Traffic patterns indicating log extraction
SIEM Query:
source_ip="printer_network" AND (uri_path CONTAINS "/logs" OR uri_path CONTAINS "log" OR user_agent="scanner")