CVE-2025-10183
📋 TL;DR
CVE-2025-10183 is a blind XML External Entity (XXE) injection vulnerability in TecCom TecConnect 4.1's OpenMessaging webservice that allows unauthenticated attackers to exfiltrate arbitrary files to external servers. This affects all users running TecConnect 4.1, which reached end-of-life in December 2023. The vulnerability enables sensitive data theft from vulnerable systems.
💻 Affected Systems
- TecCom TecConnect
⚠️ 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 through file exfiltration including sensitive configuration files, credentials, and system files leading to lateral movement or full data breach.
Likely Case
Exfiltration of sensitive files containing credentials, configuration data, or proprietary information from vulnerable servers.
If Mitigated
Limited impact if XML parsing is disabled or external entity processing is blocked at network/application layers.
🎯 Exploit Status
Public technical analysis available showing exploitation methodology. Attack requires network access to OpenMessaging webservice.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: N/A
Vendor Advisory: N/A
Restart Required: No
Instructions:
Upgrade to TecCom Connect 5 as TecConnect 4.1 is end-of-life and will not receive patches.
🔧 Temporary Workarounds
Disable XML External Entity Processing
allConfigure XML parser to disable external entity resolution
Set XML parser properties: FEATURE_SECURE_PROCESSING=true, disallow-doctype-decl=true
Network Segmentation
allRestrict access to OpenMessaging webservice port
firewall-cmd --permanent --add-rich-rule='rule family="ipv4" source address="TRUSTED_NETWORK" port protocol="tcp" port="PORT_NUMBER" accept'
netsh advfirewall firewall add rule name="Block TecConnect XXE" dir=in action=block protocol=TCP localport=PORT_NUMBER
🧯 If You Can't Patch
- Implement strict network access controls to limit exposure of TecConnect 4.1 systems
- Deploy web application firewall (WAF) with XXE protection rules and monitor for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Test if OpenMessaging webservice accepts XML with external entity references. Use curl: curl -X POST http://target:port/OpenMessaging -H 'Content-Type: application/xml' -d '<?xml version="1.0"?><!DOCTYPE test [<!ENTITY xxe SYSTEM "file:///etc/passwd">]><test>&xxe;</test>'Check Version:
Check TecConnect version in web interface or configuration filesVerify Fix Applied:
Verify upgrade to TecCom Connect 5 or test that XXE payloads no longer return file contents📡 Detection & Monitoring
Log Indicators:
- XML parsing errors with external entity references
- Unusual file access patterns from webservice process
- Outbound connections to unknown servers following XML requests
Network Indicators:
- HTTP POST requests to /OpenMessaging with XML containing SYSTEM entities
- Outbound connections to external servers following XML requests
SIEM Query:
source="webserver" AND (uri="/OpenMessaging" AND method="POST" AND content_type="application/xml") AND (body="<!ENTITY" OR body="SYSTEM")