CVE-2026-2882 is a stack-based buffer overflow vulnerability identified in the D-Link DWR-M960 router, specifically in firmware version 1.01.07. The vulnerability resides in the function sub_46385C within the /boafrm/formDosCfg file, where the handling of the submit-url parameter is flawed. An attacker can craft a malicious request manipulating this argument to overflow the stack buffer, potentially overwriting return addresses or control data. This can lead to arbitrary code execution or cause the device to crash, resulting in denial of service. The vulnerability is remotely exploitable over the network without requiring authentication or user interaction, which significantly lowers the barrier for attackers. The CVSS v4.0 score of 8.7 (high severity) reflects the ease of exploitation (network attack vector, low complexity) and the high impact on confidentiality, integrity, and availability. Although no confirmed exploits are currently observed in the wild, a public exploit has been released, increasing the urgency for mitigation. The affected product is a widely used 4G LTE router model from D-Link, often deployed in enterprise and consumer environments. The lack of an official patch or firmware update at the time of publication necessitates immediate compensating controls to reduce exposure.

The impact of this vulnerability is significant for organizations using the D-Link DWR-M960 router, especially those exposing the device's management interface to untrusted networks. Successful exploitation can lead to arbitrary code execution, allowing attackers to take full control of the device, intercept or manipulate network traffic, and pivot into internal networks. Additionally, exploitation can cause denial of service by crashing the device, disrupting network connectivity and business operations. Given the router's role in providing internet access, compromised devices can be leveraged as entry points for broader network intrusions or as part of botnets for distributed denial of service (DDoS) attacks. The remote, unauthenticated nature of the exploit increases the risk of widespread attacks, particularly in environments lacking proper network segmentation or firewall protections. This vulnerability poses a threat to confidentiality, integrity, and availability of network communications and connected systems.

Immediate mitigation should focus on restricting access to the vulnerable device's management interfaces by implementing network segmentation and firewall rules to block unauthorized inbound traffic targeting the /boafrm/formDosCfg endpoint. Organizations should monitor network traffic for suspicious requests containing unusual submit-url parameters indicative of exploitation attempts. Since no official patch is currently available, consider deploying virtual patching via intrusion prevention systems (IPS) or web application firewalls (WAF) configured to detect and block exploit patterns. Disable remote management features if not strictly necessary, or restrict them to trusted IP addresses only. Regularly check for firmware updates from D-Link and apply them promptly once released. Additionally, conduct thorough inventories of affected devices and replace or upgrade hardware if firmware updates are not forthcoming. Employ network anomaly detection tools to identify potential exploitation attempts and maintain robust incident response plans to address any compromise quickly.