Overview
CVE-2025-7766 is a high-risk vulnerability that affects the Lantronix Provisioning Manager, a widely used solution for managing network devices. This vulnerability stems from the application’s handling of XML external entities in device configuration files, which can be exploited by an attacker to execute remote code on the host system without any authentication. Given the prevalence of Lantronix Provisioning Manager in enterprise settings and the severity of the threat, it is crucial for organizations to understand and address this vulnerability promptly.
Vulnerability Summary
CVE ID: CVE-2025-7766
Severity: High (CVSS 8.0)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise and potential data leakage
Affected Products
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Product | Affected Versions
Lantronix Provisioning Manager | All versions prior to patch release
How the Exploit Works
The vulnerability arises from the improper processing of XML input in the configuration files of network devices by Lantronix Provisioning Manager. By including malicious XML external entities in these configuration files, an attacker can trick the application into executing arbitrary code or accessing sensitive data on the host system. The attack can be launched remotely over a network, without any need for user interaction or authentication.
Conceptual Example Code
Below is a conceptual example of how this vulnerability might be exploited using a malformed XML entity in a device configuration file.
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE foo [
<!ELEMENT foo ANY >
<!ENTITY xxe SYSTEM "file:///etc/passwd" >]><foo>&xxe;</foo>In this example, the entity `xxe` is defined to reference a sensitive file on the host system. When the Lantronix Provisioning Manager processes this XML, it may inadvertently expose the content of this file, leading to potential data leakage.
Recommendations
To mitigate this vulnerability, it is recommended to apply the vendor-supplied patch as soon as it is available. In the interim, the use of a web application firewall (WAF) or intrusion detection system (IDS) can provide temporary protection by blocking malicious XML entities. Organizations are also encouraged to follow best practices for secure coding and XML processing to prevent similar vulnerabilities in the future.