CVE-2025-6328 in DIR-815
Summary
by MITRE • 06/20/2025
A vulnerability was found in D-Link DIR-815 1.01. It has been declared as critical. This vulnerability affects the function sub_403794 of the file hedwig.cgi. The manipulation leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.
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Analysis
by VulDB Data Team • 06/24/2025
The vulnerability identified as CVE-2025-6328 represents a critical stack-based buffer overflow in the D-Link DIR-815 router firmware version 1.01. This flaw resides within the hedwig.cgi file and specifically targets the sub_403794 function, making it a significant security concern for network infrastructure devices. The vulnerability's classification as critical stems from its remote exploitability and the potential for arbitrary code execution on affected devices. The stack-based buffer overflow occurs when the function processes input data without proper bounds checking, allowing attackers to overwrite adjacent memory locations on the stack. This type of vulnerability falls under CWE-121, which specifically addresses stack-based buffer overflow conditions where insufficient bounds checking permits writes beyond the allocated buffer space.
The operational impact of this vulnerability extends beyond simple remote code execution, as it provides attackers with complete control over the affected router's operations. An attacker can leverage this flaw to gain unauthorized access to the device's administrative interface, potentially leading to full network compromise. The vulnerability's remote exploitability means that no physical access or local network presence is required for exploitation, making it particularly dangerous in enterprise and residential environments. The disclosure of exploit details increases the risk profile significantly, as malicious actors can readily develop and deploy attacks against unpatched devices. This vulnerability directly maps to attack techniques described in the MITRE ATT&CK framework under T1059 for command and control execution, and T1071 for application layer protocols, as attackers would likely use the compromised router as a pivot point for further network reconnaissance and lateral movement.
Mitigation strategies for CVE-2025-6328 should prioritize immediate firmware updates from D-Link, as the vendor has likely released patches addressing this specific vulnerability. Network administrators should implement network segmentation and access controls to limit potential attack vectors, while monitoring for suspicious network traffic patterns that might indicate exploitation attempts. The affected device's administrative interface should be secured through strong authentication mechanisms and access restriction policies. Additionally, implementing network-based intrusion detection systems can help identify exploitation attempts targeting this specific vulnerability. Organizations should conduct comprehensive vulnerability assessments to identify all instances of the DIR-815 router in their network infrastructure and ensure all devices receive the necessary firmware updates. The vulnerability's nature as a stack-based buffer overflow also necessitates regular security testing of network device firmware to identify similar issues before they can be exploited by malicious actors.