CVE-2025-9769 in DI-7400G+
Summary
by MITRE • 09/01/2025
A security flaw has been discovered in D-Link DI-7400G+ 19.12.25A1. Affected is the function sub_478D28 of the file /mng_platform.asp. The manipulation of the argument addr with the input `echo 12345 > poc.txt` results in command injection. An attack on the physical device is feasible. The exploit has been released to the public and may be exploited.
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Analysis
by VulDB Data Team • 09/05/2025
The vulnerability identified as CVE-2025-9769 represents a critical command injection flaw within the D-Link DI-7400G+ router firmware version 19.12.25A1. This security weakness resides in the web management interface component at the function sub_478D28 located within the /mng_platform.asp file, demonstrating a fundamental failure in input validation and sanitization that directly enables arbitrary code execution. The flaw specifically manifests when the addr parameter is processed without proper security controls, allowing attackers to inject malicious commands that are subsequently executed by the underlying operating system. This vulnerability falls under the CWE-77 category of Command Injection, which is classified as a high-severity issue in the Common Weakness Enumeration framework and represents a well-documented attack vector that has been extensively exploited in various network device compromises.
The technical exploitation of this vulnerability occurs through the manipulation of the addr argument with malicious input payloads such as `echo 12345 > poc.txt`, which demonstrates the router's failure to properly sanitize user-supplied input before incorporating it into system commands. The attack surface is particularly concerning because it allows for direct command execution on the device itself, bypassing traditional network security controls and potentially enabling attackers to gain full administrative access to the router's operating system. This type of vulnerability creates a persistent threat vector that can be exploited by attackers with minimal technical expertise, as evidenced by the public release of exploit code that makes the attack accessible to a broad range of threat actors. The physical attack feasibility aspect indicates that an attacker with access to the device's network interface or physical presence can leverage this vulnerability to compromise the system.
The operational impact of CVE-2025-9769 extends beyond simple unauthorized access, as it enables attackers to establish persistent backdoors, modify network configurations, intercept traffic, and potentially use the compromised device as a pivot point for attacking other systems within the local network. This vulnerability directly maps to several ATT&CK techniques including T1059.001 for command and scripting interpreter and T1566.001 for spearphishing via social engineering, as the attack can be delivered through web-based exploitation. The compromised router could serve as a launching point for broader network infiltration, enabling attackers to conduct reconnaissance, establish command and control channels, or perform man-in-the-middle attacks against network traffic. Organizations relying on D-Link DI-7400G+ devices face significant risk of network compromise, particularly in environments where these devices are not properly isolated or monitored for anomalous behavior.
Mitigation strategies for this vulnerability should include immediate firmware updates from D-Link to address the command injection flaw, network segmentation to limit the blast radius of potential exploitation, and implementation of network monitoring solutions to detect anomalous command execution patterns. Security teams should also consider disabling unnecessary web management interfaces, implementing strict access controls, and conducting regular vulnerability assessments of network infrastructure to identify similar weaknesses. The vulnerability demonstrates the critical importance of input validation and proper sanitization in web applications, as well as the necessity of maintaining up-to-date firmware for network devices. Organizations should also implement security awareness training to help prevent social engineering attacks that might leverage this vulnerability, as well as establish incident response procedures specifically designed to address router compromise scenarios. Regular security audits and penetration testing of network infrastructure should be conducted to identify and remediate similar vulnerabilities across the entire network ecosystem, as command injection flaws often indicate broader architectural weaknesses in web application security design.