CVE-2026-2853 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 System Log Configuration endpoint, specifically in the function sub_462E14 within the /boafrm/formSysLog component. The flaw is triggered by manipulating the submit-url argument, which leads to a stack-based buffer overflow condition. This type of overflow allows an attacker to overwrite the stack memory, potentially enabling arbitrary code execution or causing a denial of service. The vulnerability can be exploited remotely over the network without requiring authentication or user interaction, making it highly accessible to attackers. The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P) indicates network attack vector, low attack complexity, no user interaction, and partial privileges required, with high impact on confidentiality, integrity, and availability. Although no known exploits are currently active in the wild, the public availability of exploit code increases the risk of imminent attacks. The vulnerability affects a widely used D-Link router model, which is commonly deployed in both enterprise and consumer environments, potentially exposing a broad attack surface.

The impact of CVE-2026-2853 is significant for organizations using the affected D-Link DWR-M960 routers. Successful exploitation can lead to arbitrary code execution, allowing attackers to take full control of the device. This can result in unauthorized access to internal networks, interception or manipulation of network traffic, disruption of network services, and potential pivoting to other internal systems. The compromise of network infrastructure devices like routers can severely undermine organizational security, leading to data breaches, service outages, and loss of trust. Given the router’s role in managing network traffic, attackers could also launch further attacks such as man-in-the-middle, data exfiltration, or persistent network presence. The remote, unauthenticated nature of the exploit increases the likelihood of widespread attacks, especially in environments where firmware updates are not promptly applied.

To mitigate CVE-2026-2853, organizations should immediately verify if they are using the D-Link DWR-M960 router with firmware version 1.01.07. Since no official patch links are provided yet, interim mitigations include restricting access to the router’s management interface by implementing network segmentation and firewall rules to limit exposure to untrusted networks. Disabling remote management features or restricting them to trusted IP addresses can reduce attack surface. Monitoring network traffic for unusual activity targeting the /boafrm/formSysLog endpoint may help detect exploitation attempts. Organizations should engage with D-Link support channels to obtain firmware updates or security advisories. Additionally, consider replacing affected devices with models that have received security updates if patching is not feasible. Regularly auditing network devices for outdated firmware and applying security best practices for device management will help prevent exploitation of similar vulnerabilities.