CVE-2022-44807 is a critical buffer overflow vulnerability identified in the D-Link DIR-882 router firmware versions 1.10B02 and 1.20B06. The vulnerability arises from improper handling of input in the webGetVarString function, which is part of the device's web management interface. Buffer overflow vulnerabilities occur when a program writes more data to a buffer than it can hold, potentially overwriting adjacent memory. In this case, an attacker can send specially crafted HTTP requests to the router's web interface, exploiting the buffer overflow to execute arbitrary code remotely without any authentication or user interaction. The vulnerability is classified under CWE-787 (Out-of-bounds Write), indicating that the flaw allows writing data outside the intended buffer boundaries. The CVSS v3.1 base score of 9.8 reflects the critical nature of this vulnerability, with an attack vector of network (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), and impacts on confidentiality, integrity, and availability (C:H/I:H/A:H). Although no public exploits have been reported in the wild as of the publication date, the severity and ease of exploitation make this a significant threat to affected devices. The lack of available patches at the time of reporting further increases the risk for organizations using these routers. Given that the vulnerability affects the router's web management interface, successful exploitation could allow attackers to gain full control over the device, intercept or manipulate network traffic, disrupt network availability, or pivot to internal networks for further compromise.

For European organizations, the exploitation of CVE-2022-44807 could have severe consequences. The D-Link DIR-882 is a consumer and small business router, often deployed in home offices, small enterprises, and branch offices. Compromise of these devices can lead to unauthorized access to internal networks, interception of sensitive communications, and disruption of internet connectivity. This is particularly critical for organizations relying on these routers for VPN termination or remote access. The attacker’s ability to execute arbitrary code remotely without authentication means that even unprotected or minimally secured devices are at risk. The impact extends to confidentiality breaches through data interception, integrity violations by altering network traffic or device configurations, and availability issues caused by device crashes or denial of service. Additionally, compromised routers can serve as footholds for lateral movement within corporate networks or as platforms for launching further attacks such as man-in-the-middle (MITM), phishing, or malware distribution campaigns. Given the critical CVSS score and the nature of the vulnerability, organizations could face operational disruptions, data breaches, and reputational damage if this vulnerability is exploited.

1. Immediate identification and inventory of all D-Link DIR-882 routers within the organization’s network environment. 2. Since no official patches are currently available, restrict access to the router’s web management interface by limiting it to trusted IP addresses or disabling remote management entirely. 3. Implement network segmentation to isolate vulnerable routers from critical internal systems and sensitive data. 4. Monitor network traffic for unusual patterns or signs of exploitation attempts targeting the web interface, such as malformed HTTP requests or unexpected payloads. 5. Employ intrusion detection/prevention systems (IDS/IPS) with updated signatures to detect exploitation attempts related to buffer overflow attacks. 6. Encourage users and administrators to change default credentials and use strong, unique passwords to reduce risk from other attack vectors. 7. Plan for timely firmware updates once D-Link releases patches addressing this vulnerability. 8. Consider replacing affected devices with models that have a proven security track record and receive regular firmware updates. 9. Conduct security awareness training to inform users about the risks associated with vulnerable network devices and the importance of reporting anomalies.