CVE-2026-11448 in GL-MT3000
Summary
by MITRE • 06/07/2026
A weakness has been identified in GL.iNet GL-MT3000 up to 4.4.5. The affected element is the function realpath of the file /rpc of the component Minidlna Service. This manipulation of the argument kube. set causes command injection. The attack is possible to be carried out remotely. Upgrading to version 4.7 is sufficient to fix this issue. It is recommended to upgrade the affected component. The vendor confirms: "Starting from version 4.7, SDK has added global protection to intercept malicious injection".
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Analysis
by VulDB Data Team • 06/07/2026
The vulnerability identified in GL.iNet GL-MT3000 devices running firmware versions up to 4.4.5 represents a critical command injection flaw within the Minidlna service component. This weakness resides in the realpath function of the /rpc file, which processes user-supplied arguments through the kube.set parameter. The vulnerability stems from insufficient input validation and sanitization mechanisms that fail to properly handle malicious payloads passed through this specific interface. Attackers can exploit this flaw remotely by manipulating the kube.set argument to inject arbitrary commands that execute with elevated privileges within the device's operating system context. The Minidlna service, which typically handles digital media server functionality, becomes a vector for remote code execution when processing untrusted input through the vulnerable realpath function.
The technical exploitation of this vulnerability follows established patterns for command injection attacks, where the lack of proper input filtering allows attackers to append malicious commands that bypass normal execution boundaries. This flaw operates under the Common Weakness Enumeration framework as CWE-77, specifically categorized as command injection, which occurs when an application passes untrusted data to an operating system command. The attack surface is particularly concerning because it enables remote exploitation without requiring authentication, making the device susceptible to automated attacks. The vulnerability's impact extends beyond simple command execution to potentially allow full system compromise, including privilege escalation, data exfiltration, and persistent backdoor installation.
The operational implications of this vulnerability are severe for networked environments where these devices operate as part of home or small office networks. Attackers can leverage this weakness to gain complete control over the device, potentially using it as a pivot point for accessing other network resources. The remote exploitation capability means that adversaries can target these devices from anywhere on the internet without physical access or local network presence. Network monitoring systems should be configured to detect unusual traffic patterns associated with command injection attempts, while security teams must implement immediate remediation measures. The vulnerability's presence in the Minidlna service component also raises concerns about potential information disclosure, as command injection could allow attackers to access sensitive system files or configuration data.
The vendor's acknowledgment and subsequent fix in version 4.7 demonstrates a proper response to the identified security gap. The implementation of global protection mechanisms within the SDK represents a comprehensive approach to preventing similar injection attacks across multiple components. This mitigation strategy aligns with the ATT&CK framework's defensive techniques for preventing command injection by implementing input validation and sanitization at multiple layers. Organizations should prioritize immediate firmware upgrades to version 4.7 or later to eliminate the risk of exploitation. Additionally, network segmentation and access control measures should be implemented to limit the potential impact of any successful exploitation attempts. Security monitoring should include detection of unusual command execution patterns and unauthorized firmware updates to prevent attackers from maintaining persistence on compromised devices.