CVE-2026-2854 is a stack-based buffer overflow vulnerability identified in the D-Link DWR-M960 router firmware version 1.01.07. The vulnerability resides in the NTP Configuration Endpoint, specifically within the function sub_4611CC that processes the submit-url argument in the /boafrm/formNtp component. An attacker can remotely send a specially crafted request manipulating the submit-url parameter, causing a stack-based buffer overflow. This overflow can overwrite the stack, potentially allowing arbitrary code execution with the privileges of the affected process. The vulnerability requires no authentication or user interaction, making it remotely exploitable over the network. The CVSS v4.0 score is 8.7, indicating high severity, with vector metrics showing network attack vector, low attack complexity, no privileges required, no user interaction, and high impact on confidentiality, integrity, and availability. While no confirmed exploits are reported in the wild, proof-of-concept exploit code has been published, increasing the likelihood of active exploitation attempts. The affected product is a widely used 4G LTE router model, often deployed in enterprise and consumer environments for internet connectivity. The lack of available patches at the time of disclosure necessitates immediate mitigation efforts to reduce exposure. The vulnerability's exploitation could lead to full device compromise, enabling attackers to intercept or manipulate network traffic, disrupt services, or pivot into internal networks.

The impact of CVE-2026-2854 is significant for organizations relying on the D-Link DWR-M960 router. Successful exploitation can lead to arbitrary code execution on the device with elevated privileges, compromising the device's confidentiality, integrity, and availability. Attackers could intercept sensitive data, modify network configurations, disrupt internet connectivity, or use the compromised router as a foothold to launch further attacks within internal networks. This can result in data breaches, service outages, and loss of trust. Given the router's role in providing network access, the vulnerability poses a risk to both enterprise and consumer environments. The remote, unauthenticated nature of the exploit increases the attack surface, making widespread exploitation feasible, especially if automated scanning and exploitation tools emerge. The absence of patches at disclosure time exacerbates the risk, potentially leading to prolonged exposure. Organizations with large deployments of this router model face increased operational risk and potential regulatory compliance issues if exploited.

Organizations should immediately identify and inventory all D-Link DWR-M960 devices running firmware version 1.01.07. Until an official patch is released, mitigate exposure by restricting network access to the router's management interfaces, especially blocking inbound traffic to the NTP Configuration Endpoint from untrusted networks. Implement network segmentation to isolate affected devices from critical infrastructure. Employ intrusion detection/prevention systems (IDS/IPS) with signatures targeting exploit attempts against this vulnerability. Monitor network traffic for anomalous requests to /boafrm/formNtp and unusual behavior indicative of exploitation. Disable remote management features if not required. Engage with D-Link support to obtain firmware updates or workarounds as soon as they become available. Additionally, consider replacing vulnerable devices with models that have confirmed security updates if patching is delayed. Maintain comprehensive logging and incident response readiness to detect and respond to potential exploitation attempts promptly.