CVE-2025-27254
📋 TL;DR
CVE-2025-27254 is an authentication bypass vulnerability in GE Vernova EnerVista UR Setup software. Attackers can disable startup authentication by modifying a Windows registry setting that has overly permissive permissions. Organizations using affected GE Vernova EnerVista UR Setup versions on Windows systems are vulnerable.
💻 Affected Systems
- GE Vernova EnerVista UR Setup
⚠️ 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 industrial control systems, unauthorized access to critical grid infrastructure, potential manipulation of power distribution settings leading to service disruption or safety hazards.
Likely Case
Unauthorized access to EnerVista UR Setup software, configuration changes to protective relays, potential disruption of monitoring and control functions for electrical grid equipment.
If Mitigated
Limited impact with proper network segmentation, registry permissions hardening, and monitoring in place; attackers may gain access but cannot pivot to critical systems.
🎯 Exploit Status
Exploitation requires local Windows access but is technically simple - just modifying a registry value. No special tools or skills needed beyond basic Windows administration knowledge.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Latest version from GE Vernova
Vendor Advisory: https://www.gevernova.com/grid-solutions/app/DownloadFile.aspx?prod=urfamily&type=21&file=76
Restart Required: No
Instructions:
1. Download latest EnerVista UR Setup from GE Vernova portal. 2. Install update on all affected Windows systems. 3. Verify registry permissions are properly secured post-installation.
🔧 Temporary Workarounds
Restrict Registry Permissions
WindowsModify Windows registry permissions to prevent unauthorized users from changing the authentication setting.
reg add "HKLM\SOFTWARE\GE\EnerVista\URSetup" /v AuthEnabled /t REG_DWORD /d 1 /f
icacls "HKLM\SOFTWARE\GE\EnerVista\URSetup" /inheritance:r /grant:r "SYSTEM:(F)" "Administrators:(F)" /deny "Users:(W)"
🧯 If You Can't Patch
- Implement strict access controls to limit who can log into Windows systems running EnerVista UR Setup.
- Monitor registry changes for the affected key using Windows audit policies and security monitoring tools.
🔍 How to Verify
Check if Vulnerable:
Check registry key permissions: HKLM\SOFTWARE\GE\EnerVista\URSetup\AuthEnabled - if Users group has Write permissions, system is vulnerable.Check Version:
Check EnerVista UR Setup version in Control Panel > Programs and Features or via the application's About dialog.Verify Fix Applied:
Verify AuthEnabled registry value is set to 1 and only SYSTEM and Administrators have Write permissions to the key.📡 Detection & Monitoring
Log Indicators:
- Windows Security Event ID 4657 (registry value modified) for HKLM\SOFTWARE\GE\EnerVista\URSetup\AuthEnabled
- Unexpected authentication failures or bypasses in application logs
Network Indicators:
- Unauthorized connections to EnerVista UR Setup services
- Unusual configuration changes to protective relay equipment
SIEM Query:
EventID=4657 AND TargetObject="*\\SOFTWARE\\GE\\EnerVista\\URSetup\\AuthEnabled"