CVE-2025-7932 in DIR‑817L
Summary
by MITRE • 07/21/2025
A vulnerability classified as critical has been found in D-Link DIR‑817L up to 1.04B01. This affects the function lxmldbc_system of the file ssdpcgi. The manipulation leads to command injection. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.
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Analysis
by VulDB Data Team • 10/04/2025
The vulnerability identified as CVE-2025-7932 represents a critical command injection flaw within the D-Link DIR-817L router firmware version 1.04B01 and earlier. This security weakness resides in the lxmldbc_system function of the ssdpcgi file, which serves as a critical component in the router's web-based management interface. The flaw enables attackers to execute arbitrary commands on the affected device, potentially compromising the entire network infrastructure. The vulnerability's classification as critical stems from its remote exploitability and the severe consequences that can result from successful exploitation. The command injection vulnerability allows an attacker to inject malicious commands that are then executed with the privileges of the web server process, typically running with administrative access to the router's operating system. This presents a significant risk to network security as it could enable complete system compromise, data exfiltration, and potential lateral movement within the network.
The technical implementation of this vulnerability occurs through improper input validation within the ssdpcgi component, specifically in how the lxmldbc_system function processes user-supplied parameters. When legitimate users interact with the router's web interface, particularly through functions that utilize this vulnerable component, the system fails to properly sanitize or escape input data before incorporating it into system commands. This allows an attacker to inject malicious command sequences that bypass normal security controls. The vulnerability's remote exploitability means that an attacker does not require physical access to the device or local network presence to carry out the attack, making it particularly dangerous for widespread deployment. The disclosed exploit demonstrates how an attacker can manipulate parameters within the web interface to inject operating system commands that execute with elevated privileges. This type of vulnerability aligns with CWE-77 and CWE-88, which specifically address command injection flaws where user-controllable data is improperly incorporated into command execution contexts without adequate sanitization.
The operational impact of CVE-2025-7932 extends far beyond simple unauthorized access to a single network device. Successful exploitation can result in complete network compromise, as attackers can leverage the compromised router as a pivot point to access other devices within the local network. The vulnerability enables persistent access to the affected network, allowing attackers to maintain control over the compromised device for extended periods. Network reconnaissance becomes possible, as attackers can use the compromised router to scan internal network segments, identify additional vulnerable devices, and map network topology. The attack surface expands significantly since routers often serve as gateways to critical network infrastructure, making them prime targets for advanced persistent threats. Additionally, the compromised device can be used for malicious activities such as DNS hijacking, man-in-the-middle attacks, or as part of botnet operations, potentially affecting thousands of connected devices. This vulnerability also violates fundamental security principles outlined in the MITRE ATT&CK framework, particularly the execution and privilege escalation techniques that attackers can employ to gain unauthorized access to systems.
Mitigation strategies for CVE-2025-7932 must prioritize immediate firmware updates from D-Link, as this represents the most effective defense against exploitation. Network administrators should implement network segmentation to limit the potential impact of a successful compromise, ensuring that the affected router cannot serve as a gateway to other critical network segments. Access controls should be strengthened through the implementation of secure network management practices, including disabling unnecessary services and restricting remote management access to trusted IP addresses only. Monitoring systems should be enhanced to detect unusual network traffic patterns that might indicate exploitation attempts, particularly around the web interface ports of affected devices. Network administrators should also consider implementing intrusion detection systems that can identify known exploit signatures for this vulnerability. Regular vulnerability assessments should be conducted to identify other potentially affected devices within the network, as similar vulnerabilities may exist in other D-Link products or third-party firmware components. The remediation process must include comprehensive network audits to ensure that all affected devices are properly updated and that no unauthorized modifications have been made to the network infrastructure. Organizations should also develop incident response procedures specifically tailored to address router compromise scenarios, as the nature of this vulnerability requires specialized handling due to its impact on network infrastructure and potential for widespread disruption.