CVE-2025-47188
📋 TL;DR
This CVE describes a command injection vulnerability in Mitel SIP phones that allows unauthenticated attackers to execute arbitrary commands on affected devices. Attackers could read or modify sensitive configuration data, disrupt phone operations, or compromise device availability. Affected products include Mitel 6800 Series, 6900 Series, 6900w Series SIP Phones, and 6970 Conference Units.
💻 Affected Systems
- Mitel 6800 Series SIP Phones
- Mitel 6900 Series SIP Phones
- Mitel 6900w Series SIP Phones
- Mitel 6970 Conference Unit
⚠️ 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
Complete device compromise allowing attacker to reconfigure phones, intercept calls, install persistent malware, or use devices as footholds into corporate networks.
Likely Case
Disruption of phone services, unauthorized access to call logs and configuration data, or use of phones in DDoS attacks.
If Mitigated
Limited impact due to network segmentation and proper access controls preventing external exploitation.
🎯 Exploit Status
Exploitation requires sending specially crafted SIP messages to vulnerable devices. No authentication required.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 6.4 SP4 (R6.4.0.4006) for phones; check vendor advisory for 6970 Conference Unit
Vendor Advisory: https://www.mitel.com/support/security-advisories/mitel-product-security-advisory-misa-2025-0004
Restart Required: Yes
Instructions:
1. Access Mitel support portal 2. Download latest firmware for affected models 3. Deploy firmware update to all affected devices 4. Reboot devices after update
🔧 Temporary Workarounds
Network Segmentation
allIsolate SIP phones in separate VLAN with strict firewall rules limiting SIP traffic to trusted sources only.
SIP Traffic Filtering
allImplement SIP-aware firewall or session border controller to filter malicious SIP messages.
🧯 If You Can't Patch
- Segment phone network completely from critical systems and internet
- Implement strict network access controls allowing only necessary SIP traffic from PBX systems
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via phone web interface or physical device menu (Settings > Status > Version)Check Version:
Via phone web interface: navigate to Status page or use physical phone menu: Settings > Status > VersionVerify Fix Applied:
Confirm firmware version is newer than affected versions listed in advisory📡 Detection & Monitoring
Log Indicators:
- Unusual SIP message patterns
- Failed authentication attempts on SIP ports
- Unexpected configuration changes
Network Indicators:
- Unusual outbound connections from phones
- SIP traffic from unexpected sources
- Multiple failed SIP requests
SIEM Query:
source="sip-phones" AND (message="*injection*" OR message="*command*" OR status="failed")