CVE-2025-27803
📋 TL;DR
This CVE describes a critical authentication bypass vulnerability in certain devices where both the web interface and MQTT server lack any authentication mechanisms. Attackers with network access can gain administrative privileges, reconfigure devices, and access sensitive data. This affects organizations using these vulnerable devices in their networks.
💻 Affected Systems
- eCharge wallbox charging stations
⚠️ 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 takeover allowing attackers to reconfigure devices, steal sensitive data, disrupt operations, or use devices as entry points into broader networks.
Likely Case
Unauthorized administrative access leading to device reconfiguration, data exposure, and potential disruption of device functionality.
If Mitigated
Limited impact if devices are properly segmented and network access is restricted to authorized users only.
🎯 Exploit Status
Exploitation requires only network access - no authentication, credentials, or special tools needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor for specific patched firmware version
Vendor Advisory: https://r.sec-consult.com/echarge
Restart Required: Yes
Instructions:
1. Contact device vendor for patched firmware
2. Backup device configuration
3. Apply firmware update following vendor instructions
4. Verify authentication is now required for web interface and MQTT
🔧 Temporary Workarounds
Network Segmentation
allIsolate vulnerable devices in separate network segments with strict access controls
Firewall Rules
allBlock all external access to device web interface and MQTT ports (typically 80/443 and 1883)
🧯 If You Can't Patch
- Implement strict network segmentation to isolate vulnerable devices
- Deploy network-based authentication proxy in front of devices
🔍 How to Verify
Check if Vulnerable:
Attempt to access device web interface or MQTT server without credentials - if access is granted, device is vulnerableCheck Version:
Check device web interface or contact vendor for firmware version informationVerify Fix Applied:
Verify that both web interface and MQTT server now require authentication before granting access📡 Detection & Monitoring
Log Indicators:
- Unauthenticated administrative access attempts
- Configuration changes from unexpected sources
- MQTT connections without authentication
Network Indicators:
- Unusual administrative traffic patterns
- External connections to device management ports
- MQTT traffic without authentication handshake
SIEM Query:
source_ip=external AND (dest_port=80 OR dest_port=443 OR dest_port=1883) AND device_type='charging_station'