CVE-2025-8320
📋 TL;DR
Network-adjacent attackers can execute arbitrary code on Tesla Wall Connector devices without authentication by sending specially crafted HTTP requests with malicious Content-Length headers. This buffer overflow vulnerability affects Tesla Wall Connector installations that haven't been patched.
💻 Affected Systems
- Tesla Wall Connector
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attackers to control charging functions, access connected networks, or use the device as a foothold for lateral movement.
Likely Case
Device takeover enabling manipulation of charging schedules, energy consumption monitoring, or disruption of charging services.
If Mitigated
Limited impact if devices are network-isolated or behind strict firewalls, though the vulnerability remains present.
🎯 Exploit Status
ZDI-CAN-26300 indicates this was reported through coordinated disclosure. The vulnerability requires network adjacency but no authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Tesla firmware updates
Vendor Advisory: https://www.zerodayinitiative.com/advisories/ZDI-25-711/
Restart Required: Yes
Instructions:
1. Access Tesla Wall Connector management interface. 2. Check for firmware updates. 3. Apply latest firmware update. 4. Reboot device after update completes.
🔧 Temporary Workarounds
Network Segmentation
allIsolate Tesla Wall Connectors on separate VLAN or network segment
Firewall Restrictions
allBlock all inbound traffic to Tesla Wall Connectors except from authorized management systems
🧯 If You Can't Patch
- Disconnect Tesla Wall Connectors from network entirely and use local control only
- Implement strict network access controls allowing only specific IP addresses to communicate with the devices
🔍 How to Verify
Check if Vulnerable:
Check firmware version against latest available from Tesla. If not on latest version, assume vulnerable.Check Version:
Check device management interface or Tesla mobile app for firmware versionVerify Fix Applied:
Confirm firmware version matches or exceeds patch version from Tesla advisory📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP requests with abnormal Content-Length values
- Multiple failed connection attempts
- Unexpected device reboots
Network Indicators:
- HTTP requests with Content-Length headers exceeding normal ranges
- Traffic from unexpected sources to port 80/443 on Wall Connectors
SIEM Query:
source_ip=* AND dest_port=80 AND http_content_length>1000000