CVE-2025-40752
📋 TL;DR
This vulnerability allows authenticated local attackers to extract plain-text SMTP passwords from Siemens SICAM Q100/Q200 power meters. Attackers could then misuse the SMTP service for spam, phishing, or data exfiltration. Affected are specific SICAM Q100 and Q200 models running vulnerable firmware versions.
💻 Affected Systems
- POWER METER SICAM Q100 (7KG9501-0AA01-0AA1)
- POWER METER SICAM Q100 (7KG9501-0AA01-2AA1)
- POWER METER SICAM Q100 (7KG9501-0AA31-0AA1)
- POWER METER SICAM Q100 (7KG9501-0AA31-2AA1)
- POWER METER SICAM Q200 family
⚠️ 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
An attacker gains SMTP credentials, uses the service for large-scale spam/phishing campaigns, potentially causing reputational damage, blacklisting, or enabling further attacks via email.
Likely Case
Local authenticated user extracts SMTP password, uses it for unauthorized email sending or reconnaissance of email infrastructure.
If Mitigated
With proper network segmentation and access controls, impact is limited to internal misuse with minimal external effect.
🎯 Exploit Status
Exploitation requires authenticated local access to the device. No public exploit code is known at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Q100: V2.62 or later, Q200: V2.80 or later
Vendor Advisory: https://cert-portal.siemens.com/productcert/html/ssa-529291.html
Restart Required: No
Instructions:
1. Download firmware update from Siemens Industrial Security. 2. Follow Siemens update procedures for SICAM devices. 3. Apply firmware update to affected devices. 4. Verify firmware version after update.
🔧 Temporary Workarounds
Disable SMTP functionality
allRemove or disable SMTP configuration on affected devices if email alerts are not required.
Use device web interface or configuration tool to disable SMTP settings
Implement network segmentation
allRestrict device network access to prevent unauthorized local access and limit SMTP communication.
Configure firewall rules to limit device access to authorized management systems only
🧯 If You Can't Patch
- Implement strict access controls to limit who can authenticate to affected devices
- Monitor SMTP traffic from these devices for unusual activity or volume spikes
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via web interface or management software. If version falls in vulnerable range and SMTP is configured, device is vulnerable.Check Version:
Use Siemens SICAM configuration tools or web interface to check firmware versionVerify Fix Applied:
Confirm firmware version is Q100 V2.62+ or Q200 V2.80+ after update. Verify SMTP functionality still works if needed.📡 Detection & Monitoring
Log Indicators:
- Multiple authentication attempts to device management interface
- Configuration changes to SMTP settings
- Unusual access patterns to device configuration
Network Indicators:
- SMTP traffic from industrial devices to unexpected destinations
- Unusual volume of email traffic from device IPs
SIEM Query:
source_ip IN [device_ips] AND (protocol="SMTP" OR destination_port=25 OR destination_port=587) AND volume > threshold