CVE-2026-1227
📋 TL;DR
This XXE vulnerability in Schneider Electric's EBO system allows attackers to read local files, interact with internal systems, or cause denial of service by uploading malicious TGML graphics files. It affects local users who can upload files to the EBO server from Workstation. The vulnerability stems from improper XML parsing that doesn't restrict external entity references.
💻 Affected Systems
- Schneider Electric EcoStruxure Building Operation (EBO)
⚠️ 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 system compromise including sensitive file disclosure, lateral movement within the EBO environment, and persistent denial of service affecting critical building operations.
Likely Case
Unauthorized access to local files containing configuration data, credentials, or sensitive operational information from the EBO server.
If Mitigated
Limited impact with proper file upload restrictions and network segmentation, potentially only affecting non-critical files.
🎯 Exploit Status
Requires authenticated access to upload files; exploitation requires knowledge of TGML/XML structure
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check SEVD-2026-041-02 for specific patched versions
Vendor Advisory: https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2026-041-02&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2026-041-02.pdf
Restart Required: Yes
Instructions:
1. Download the security patch from Schneider Electric's security portal
2. Backup EBO system configuration and databases
3. Apply the patch following vendor instructions
4. Restart EBO services as required
5. Verify patch installation and system functionality
🔧 Temporary Workarounds
Restrict TGML File Uploads
allImplement strict file upload policies to block or quarantine TGML files from untrusted sources
Network Segmentation
allIsolate EBO servers from other critical systems and implement strict firewall rules
🧯 If You Can't Patch
- Implement strict access controls to limit who can upload files to EBO servers
- Deploy XML security gateways or WAFs to filter malicious XML content before it reaches EBO servers
🔍 How to Verify
Check if Vulnerable:
Check if your EBO version matches affected versions in SEVD-2026-041-02 advisoryCheck Version:
Check EBO server version through management console or system propertiesVerify Fix Applied:
Verify patch installation through EBO management console and confirm version is updated beyond vulnerable range📡 Detection & Monitoring
Log Indicators:
- Unusual TGML file uploads
- XML parsing errors in EBO logs
- File access attempts to sensitive system paths
Network Indicators:
- Unexpected outbound connections from EBO servers following file uploads
- Large XML payloads to EBO upload endpoints
SIEM Query:
source="ebo_server" AND (event="file_upload" AND file_extension="tgml") OR (event="xml_parse_error")