CVE-2025-64052
📋 TL;DR
This vulnerability allows unauthenticated attackers on the same local network to execute arbitrary system commands on Fanvil x210 V2 IP phones. Attackers can gain full control of affected devices without needing credentials. Organizations using these phones in their networks are affected.
💻 Affected Systems
- Fanvil x210 V2 IP Phone
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of IP phone allowing attackers to install persistent malware, intercept calls, pivot to other network devices, or use the device as a foothold for lateral movement.
Likely Case
Attackers execute commands to reconfigure the phone, intercept VoIP traffic, or use the device as a proxy for network attacks.
If Mitigated
Limited impact if phones are isolated in separate VLANs with strict network segmentation and access controls.
🎯 Exploit Status
GitHub advisory suggests exploit details are public. Attack requires only network access, no authentication needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: http://fanvil.com
Restart Required: Yes
Instructions:
1. Check Fanvil website for security updates. 2. Download latest firmware. 3. Upload to phone via web interface. 4. Reboot phone after update.
🔧 Temporary Workarounds
Network Segmentation
allIsolate IP phones in separate VLAN with strict firewall rules
Access Control Lists
linuxRestrict network access to phone management interfaces
# Example: iptables -A INPUT -s 192.168.1.0/24 -p tcp --dport 80 -j ACCEPT
# iptables -A INPUT -p tcp --dport 80 -j DROP
🧯 If You Can't Patch
- Segment phones into dedicated VLAN with no access to critical systems
- Implement strict firewall rules blocking all unnecessary traffic to phone management interfaces
🔍 How to Verify
Check if Vulnerable:
Check phone firmware version via web interface (Settings > System > Status) for version 2.12.20Check Version:
curl -s http://[phone-ip]/cgi-bin/getstatus.cgi | grep firmwareVerify Fix Applied:
Verify firmware version is updated to a version later than 2.12.20📡 Detection & Monitoring
Log Indicators:
- Unusual command execution in system logs
- Multiple failed authentication attempts followed by successful access
- Unexpected configuration changes
Network Indicators:
- Unusual outbound connections from IP phones
- Traffic to unexpected ports from phone management interface
- HTTP requests with command injection patterns
SIEM Query:
source="phone_logs" AND ("cmd.exe" OR "bash" OR "/bin/sh" OR "wget" OR "curl")