CVE-2025-4676
📋 TL;DR
This vulnerability allows attackers to bypass authentication on ABB WebPro SNMP Card PowerValue devices due to incorrect implementation of the authentication algorithm. Affected organizations using these devices for power monitoring and management could have unauthorized access to critical infrastructure systems. The issue impacts both PowerValue and PowerValue UL models.
💻 Affected Systems
- ABB WebPro SNMP Card PowerValue
- ABB WebPro SNMP Card PowerValue UL
⚠️ 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 compromise of power monitoring infrastructure allowing unauthorized control, configuration changes, or disabling of monitoring capabilities, potentially leading to operational disruption or safety issues.
Likely Case
Unauthorized access to power monitoring data, configuration viewing/modification, and potential lateral movement to connected systems.
If Mitigated
Limited impact if devices are isolated in protected networks with strict access controls and monitoring.
🎯 Exploit Status
Authentication bypass vulnerabilities typically have low exploitation complexity once the flaw is understood.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 1.1.8.K
Vendor Advisory: https://search.abb.com/library/Download.aspx?DocumentID=2CRT000009&LanguageCode=en&DocumentPartId=&Action=Launch
Restart Required: Yes
Instructions:
1. Download updated firmware from ABB support portal. 2. Backup current configuration. 3. Upload and install new firmware via web interface. 4. Reboot device. 5. Restore configuration if needed. 6. Verify authentication works correctly.
🔧 Temporary Workarounds
Network segmentation
allIsolate affected devices in separate VLANs with strict firewall rules limiting access to authorized management stations only.
Access control restrictions
allImplement IP-based access controls on network devices to restrict connections to WebPro SNMP cards from specific management IPs only.
🧯 If You Can't Patch
- Implement strict network segmentation and firewall rules to isolate affected devices from untrusted networks
- Enable detailed logging and monitoring for authentication attempts and configuration changes on affected devices
🔍 How to Verify
Check if Vulnerable:
Check firmware version via web interface or SNMP query. If version is 1.1.8.K or earlier, device is vulnerable.Check Version:
snmpget -v2c -c public <device_ip> 1.3.6.1.2.1.1.1.0Verify Fix Applied:
After patching, attempt authentication bypass using known methods. Verify version shows >1.1.8.K. Test authentication functionality.📡 Detection & Monitoring
Log Indicators:
- Failed authentication attempts followed by successful access
- Configuration changes from unexpected IP addresses
- Multiple authentication attempts in short time
Network Indicators:
- SNMP or HTTP traffic to WebPro cards from unauthorized sources
- Unusual port scanning activity targeting port 161/162 or web ports
SIEM Query:
source="webpro_logs" AND (event_type="auth_failure" OR event_type="config_change") | stats count by src_ip dest_ip