CVE-2025-30254
📋 TL;DR
An unauthenticated attacker can retrieve smart meter serial numbers using only the owner's username, bypassing authentication requirements. This affects smart meter systems that expose this information through vulnerable interfaces. Utility companies and their customers with affected smart meters are impacted.
💻 Affected Systems
- Specific smart meter models not specified in advisory
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Serial number enumeration could facilitate physical attacks, meter tampering, or serve as reconnaissance for more severe attacks by identifying specific devices.
Likely Case
Information disclosure that could be used for social engineering, targeted phishing against utility customers, or inventory mapping of smart meter deployments.
If Mitigated
Limited to non-sensitive information disclosure with no direct access to meter controls or customer data.
🎯 Exploit Status
Exploitation requires only knowledge of a valid username and network access to the vulnerable interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified
Vendor Advisory: https://www.cisa.gov/news-events/ics-advisories/icsa-25-105-04
Restart Required: No
Instructions:
Consult vendor-specific documentation for patching guidance as this CVE affects multiple smart meter manufacturers.
🔧 Temporary Workarounds
Network Segmentation
allIsolate smart meter management interfaces from untrusted networks
Authentication Enforcement
allRequire full authentication for all serial number queries
🧯 If You Can't Patch
- Implement network access controls to restrict access to smart meter interfaces
- Monitor for unusual serial number query patterns in system logs
🔍 How to Verify
Check if Vulnerable:
Test if serial number can be retrieved using only username without password via smart meter interfaceCheck Version:
Vendor-specific command to check smart meter firmware versionVerify Fix Applied:
Verify that serial number queries now require full authentication📡 Detection & Monitoring
Log Indicators:
- Multiple failed authentication attempts followed by successful serial number queries
- Serial number queries from unusual IP addresses
Network Indicators:
- Unencrypted serial number data in network traffic
- HTTP requests to serial number endpoints without authentication headers
SIEM Query:
source="smart_meter_logs" AND (event="serial_query" AND auth_status="none")