CVE-2025-61941
📋 TL;DR
A path traversal vulnerability in WXR9300BE6P series firmware allows authenticated administrative users to alter arbitrary files, potentially leading to arbitrary command execution. This affects WXR9300BE6P devices running firmware versions prior to Ver.1.10. Attackers with admin credentials can exploit this to compromise the device.
💻 Affected Systems
- Buffalo WXR9300BE6P series routers
⚠️ 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
Full device compromise with persistent backdoor installation, data exfiltration, and use as pivot point into internal networks.
Likely Case
Unauthorized file modification leading to service disruption, configuration changes, or limited command execution within device constraints.
If Mitigated
Limited impact due to strong access controls, network segmentation, and admin credential protection.
🎯 Exploit Status
Exploitation requires admin credentials but path traversal techniques are well-documented and simple to implement.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Ver.1.10
Vendor Advisory: https://www.buffalo.jp/news/detail/20251014-01.html
Restart Required: Yes
Instructions:
1. Download firmware Ver.1.10 from Buffalo support site. 2. Log into router admin interface. 3. Navigate to firmware update section. 4. Upload and apply the new firmware. 5. Wait for automatic reboot.
🔧 Temporary Workarounds
Restrict admin access
allLimit administrative interface access to trusted IP addresses only
Configure firewall rules to restrict access to router admin interface (typically port 80/443)
Strong credential policy
allImplement complex admin passwords and consider multi-factor authentication if supported
Change admin password to complex, unique credential
🧯 If You Can't Patch
- Isolate device in separate VLAN with strict network segmentation
- Implement monitoring for unusual file modification or command execution attempts
🔍 How to Verify
Check if Vulnerable:
Check firmware version in router admin interface under System Information or similar sectionCheck Version:
Login to router web interface and navigate to System Status or Firmware Information pageVerify Fix Applied:
Confirm firmware version shows Ver.1.10 or higher after update📡 Detection & Monitoring
Log Indicators:
- Unusual file path access patterns in web server logs
- Unexpected file modification timestamps
- Administrative login from unusual IP addresses
Network Indicators:
- Unusual outbound connections from router
- Traffic patterns suggesting command execution
SIEM Query:
source="router_logs" AND (path_traversal_patterns OR admin_login_from_unusual_ip)