CVE-2025-0481 in DIR-878
Summary
by MITRE • 01/15/2025
A vulnerability classified as problematic has been found in D-Link DIR-878 1.03. Affected is an unknown function of the file /dllog.cgi of the component HTTP POST Request Handler. The manipulation leads to information disclosure. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.
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Analysis
by VulDB Data Team • 07/16/2025
The vulnerability identified as CVE-2025-0481 represents a significant security weakness in D-Link DIR-878 router firmware version 1.03, specifically within the HTTP POST request handler component. This issue falls under the category of information disclosure vulnerabilities that can be exploited remotely, posing substantial risks to network security. The affected file dllog.cgi contains an unknown function that processes HTTP POST requests, creating an attack surface that allows unauthorized access to sensitive information. The vulnerability's classification as problematic indicates that it has been thoroughly analyzed and confirmed to present real security concerns for affected systems.
The technical flaw manifests in the improper handling of HTTP POST requests within the dllog.cgi file, where the unknown function fails to adequately validate or sanitize input parameters. This inadequate input processing creates opportunities for attackers to manipulate the request parameters and extract confidential data from the router's logging mechanisms. The vulnerability's remote exploitability means that attackers do not require physical access to the device or local network presence to launch attacks, significantly expanding the potential threat surface. The disclosure of the exploit to the public community has transformed this vulnerability from a theoretical risk into an active threat that malicious actors can readily leverage.
The operational impact of CVE-2025-0481 extends beyond simple information disclosure, as it can potentially enable attackers to gain insights into network configurations, user activities, and system internals. This information can serve as a foundation for more sophisticated attacks, including privilege escalation, further system compromise, or targeted attacks against connected devices. The vulnerability affects not only individual router configurations but also the broader network security posture of organizations relying on D-Link DIR-878 devices. The remote nature of the exploit means that attackers can target vulnerable devices from anywhere on the internet, making the attack vector particularly dangerous for enterprise networks and home users alike.
Security professionals should prioritize the implementation of immediate mitigations including firmware updates from D-Link, network segmentation, and firewall rule configurations to restrict access to the affected HTTP endpoints. The vulnerability aligns with CWE-200 (Information Disclosure) and potentially CWE-284 (Improper Access Control) categories, while its remote exploitability maps to ATT&CK technique T1071.004 (Application Layer Protocol: DNS) and T1046 (Network Service Scanning) for initial reconnaissance. Organizations should conduct comprehensive vulnerability assessments to identify all affected devices and implement network monitoring to detect potential exploitation attempts. The public disclosure of this exploit emphasizes the urgency of remediation efforts and highlights the importance of maintaining up-to-date security patches for network infrastructure devices.