CVE-2024-40505 identifies a directory traversal vulnerability in the D-Link DAP-1650 router firmware version 1.03, specifically within the hedwig.cgi component. Directory traversal (CWE-35) allows attackers to access files and directories outside the intended web root by manipulating file path inputs. In this case, a local attacker can exploit this flaw to escalate privileges on the device without needing prior authentication or user interaction, as indicated by the CVSS vector (AV:L/AC:L/PR:N/UI:N). The vulnerability's impact is critical, with a CVSS v3.1 base score of 9.3, reflecting high confidentiality, integrity, and availability impacts. Exploiting this vulnerability could allow an attacker to read or modify sensitive configuration files, execute arbitrary commands, or disrupt device operations, potentially leading to full device compromise. Although no public exploits are currently known, the vulnerability's nature and severity suggest that exploitation could be straightforward for attackers with local access. The affected firmware version is 1.03, but no further version details are provided. The lack of available patches at the time of publication emphasizes the urgency for D-Link and users to address this issue promptly.

The vulnerability poses a severe risk to organizations using the D-Link DAP-1650 router, especially in environments where local network access is possible for untrusted users or devices. Successful exploitation can lead to full device compromise, allowing attackers to alter network configurations, intercept or redirect traffic, and potentially pivot to other internal systems. This threatens the confidentiality of sensitive data, the integrity of network operations, and the availability of network services. Critical infrastructure, enterprises, and small-to-medium businesses relying on this router model may face significant operational disruptions and data breaches. The local attack vector limits remote exploitation but does not eliminate risk, as attackers could gain local access through compromised devices or insider threats. The absence of known exploits currently reduces immediate widespread impact but does not diminish the urgency of mitigation given the critical severity.

1. Restrict physical and local network access to the D-Link DAP-1650 devices to trusted personnel and systems only. 2. Monitor network traffic and device logs for unusual activity related to the hedwig.cgi component or unexpected file access attempts. 3. Apply any official firmware updates or patches released by D-Link addressing CVE-2024-40505 as soon as they become available. 4. If patches are not yet available, consider isolating affected devices on segmented networks with strict access controls to minimize exposure. 5. Disable or restrict access to the hedwig.cgi component if possible through device configuration or firewall rules. 6. Conduct regular security assessments and penetration tests focusing on local network vulnerabilities to detect potential exploitation attempts. 7. Educate internal users about the risks of local network threats and enforce strong endpoint security to prevent lateral movement.