Overview
The Common Vulnerabilities and Exposures (CVE) system has identified a significant security vulnerability, labeled CVE-2025-10183, which impacts the TecCom TecConnect 4.1 webservice. This vulnerability involves a blind XML External Entity (XXE) injection, potentially allowing an unauthenticated attacker to exfiltrate arbitrary files to an attacker-controlled server. Given that TecConnect 4.1 reached its end-of-life stage in December 2023, users are strongly advised to upgrade to TecCom Connect 5. This vulnerability matters because it poses a potential risk of system compromise and data leakage, which could lead to detrimental consequences for businesses and individuals alike.
Vulnerability Summary
CVE ID: CVE-2025-10183
Severity: Critical (CVSS: 9.1)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise and data leakage
Affected Products
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Product | Affected Versions
TecCom TecConnect | 4.1
How the Exploit Works
The exploit takes advantage of the blind XXE injection vulnerability in the OpenMessaging webservice of the TecCom TecConnect 4.1. An attacker, without requiring any authentication, can inject malicious XML entities into the system. These entities can then be used to exfiltrate arbitrary files to a server that is controlled by the attacker. As a result, the attacker could potentially gain unauthorized access to sensitive data or even compromise the entire system.
Conceptual Example Code
This conceptual example illustrates how an attacker might exploit this vulnerability via a HTTP POST request:
POST /OpenMessaging/endpoint HTTP/1.1
Host: target.example.com
Content-Type: application/xml
<!DOCTYPE foo [
<!ELEMENT foo ANY >
<!ENTITY xxe SYSTEM "file:///etc/passwd" >]>
<foo>&xxe;</foo>In this example, the attacker is attempting to read the content of “/etc/passwd” file which typically contains user account details on a Unix-like operating system.
Countermeasures
To mitigate this vulnerability, users are strongly advised to upgrade their TecCom TecConnect system to version 5. If immediate upgrading is not feasible, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation. Furthermore, a vendor patch addressing this vulnerability should be applied as soon as it becomes available.
