CVE-2025-7194 in DI-500WF
Summary
by MITRE • 07/09/2025
A vulnerability was found in D-Link DI-500WF 17.04.10A1T. It has been declared as critical. Affected by this vulnerability is the function sprintf of the file ip_position.asp of the component jhttpd. The manipulation of the argument ip leads to stack-based buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.
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Analysis
by VulDB Data Team • 07/14/2025
The vulnerability identified as CVE-2025-7194 represents a critical stack-based buffer overflow in the D-Link DI-500WF wireless router model running firmware version 17.04.10A1T. This flaw exists within the jhttpd web server component and specifically affects the sprintf function call within the ip_position.asp file. The vulnerability arises from improper input validation when processing the ip argument, creating an exploitable condition that allows attackers to manipulate memory layout through carefully crafted input parameters. The affected device operates a web interface that handles network configuration parameters, making the attack surface particularly concerning for remote exploitation scenarios.
The technical implementation of this vulnerability stems from the insecure use of the sprintf function without proper bounds checking on user-supplied input. When the ip argument is processed through the vulnerable function, the buffer allocated for storing the formatted string becomes insufficient to accommodate the malicious input, leading to memory corruption that can overwrite adjacent stack frames. This type of vulnerability maps directly to CWE-121 Stack-based Buffer Overflow, which is classified as a critical weakness in the CWE database due to its potential for arbitrary code execution. The attack vector requires only remote access to the web interface, making it particularly dangerous as it does not require physical proximity or local network access to exploit.
The operational impact of this vulnerability extends beyond simple denial of service, as it provides potential attackers with a pathway to achieve arbitrary code execution on the affected device. Successful exploitation could allow remote attackers to gain full administrative control over the router, enabling them to modify network configurations, redirect traffic, establish backdoors, or use the device as a pivot point for attacking other systems within the local network. The public disclosure of exploitation techniques significantly increases the risk to affected deployments, as the attack methods are readily available to malicious actors without requiring advanced exploitation skills. Network security professionals must consider this vulnerability as a high-priority threat requiring immediate attention and remediation.
Mitigation strategies for CVE-2025-7194 should prioritize immediate firmware updates from D-Link, as the vendor is expected to release security patches addressing the buffer overflow condition in the jhttpd component. Network administrators should implement additional protective measures including disabling unnecessary web services, implementing network segmentation to isolate affected devices, and monitoring for suspicious network traffic patterns that might indicate exploitation attempts. The vulnerability aligns with ATT&CK technique T1059.007 for Command and Scripting Interpreter, as exploitation could enable attackers to execute arbitrary commands on the compromised device. Organizations should also consider implementing intrusion detection systems that can identify attempts to exploit this specific buffer overflow pattern, as well as maintaining comprehensive network monitoring to detect unauthorized configuration changes or unusual traffic flows that might indicate successful compromise of the affected routers.