CVE-2025-6625
📋 TL;DR
An improper input validation vulnerability in Schneider Electric devices allows attackers to cause denial of service by sending specially crafted FTP commands. This affects systems running vulnerable Schneider Electric software with FTP services enabled. Attackers can disrupt device functionality without authentication.
💻 Affected Systems
- Schneider Electric devices with vulnerable FTP implementation
⚠️ 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 unavailability requiring physical reset or maintenance intervention to restore functionality.
Likely Case
Temporary service disruption affecting FTP functionality and potentially related services on the device.
If Mitigated
No impact if FTP service is disabled or network access is properly restricted.
🎯 Exploit Status
Exploitation requires sending crafted FTP commands to vulnerable service. No authentication needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to Schneider Electric security advisory SEVD-2025-224-05
Vendor Advisory: https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2025-224-05&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2025-224-05.pdf
Restart Required: Yes
Instructions:
1. Review Schneider Electric advisory SEVD-2025-224-05. 2. Identify affected products and versions. 3. Apply vendor-provided patches or firmware updates. 4. Restart affected devices as required. 5. Verify service restoration.
🔧 Temporary Workarounds
Disable FTP Service
allCompletely disable FTP service if not required for operations
Device-specific configuration commands vary by product
Network Segmentation
allRestrict network access to FTP service using firewalls or ACLs
iptables -A INPUT -p tcp --dport 21 -j DROP
netsh advfirewall firewall add rule name="Block FTP" dir=in action=block protocol=TCP localport=21
🧯 If You Can't Patch
- Implement strict network access controls to limit FTP service exposure
- Monitor FTP service logs for unusual activity and implement rate limiting
🔍 How to Verify
Check if Vulnerable:
Check if device runs affected Schneider Electric software with FTP service enabled and accessibleCheck Version:
Device-specific commands; consult product documentation for version checkingVerify Fix Applied:
Verify patch installation via device management interface and test FTP service functionality📡 Detection & Monitoring
Log Indicators:
- Unusual FTP command patterns
- Multiple failed FTP connections
- FTP service crash logs
Network Indicators:
- Unusual FTP traffic patterns
- FTP commands with malformed parameters
- Port 21 scanning activity
SIEM Query:
source="ftp.log" AND (command="*crafted*" OR command="*malformed*" OR status="crash")