CVE-2026-2958 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 function sub_457C5C within the /boafrm/formWsc file, where the argument save_apply is improperly handled, allowing an attacker to overwrite the stack memory. This flaw can be triggered remotely without requiring authentication or user interaction, making it highly accessible to attackers. Exploiting this vulnerability could enable remote code execution, allowing attackers to take full control of the affected device, disrupt network operations, or pivot to internal networks. The vulnerability has been publicly disclosed, which increases the likelihood of exploitation despite no known active exploits in the wild at present. The CVSS 4.0 vector indicates network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:L), no user interaction (UI:N), and high impact on confidentiality, integrity, and availability (C:H, I:H, A:H). The lack of available patches at the time of disclosure necessitates immediate mitigation efforts. This vulnerability is critical for organizations relying on the DWR-M960 for network connectivity, especially in environments where network security is paramount.

The exploitation of CVE-2026-2958 can lead to complete compromise of the D-Link DWR-M960 router, allowing attackers to execute arbitrary code remotely. This can result in unauthorized access to internal networks, interception or manipulation of network traffic, disruption of internet connectivity, and potential lateral movement within corporate or home networks. The high impact on confidentiality, integrity, and availability means sensitive data could be exposed or altered, and network services could be rendered unavailable. Organizations using this device in critical infrastructure, enterprise environments, or sensitive government networks face significant operational and security risks. The ease of exploitation without authentication increases the threat level, making automated mass exploitation campaigns feasible. Additionally, compromised routers can be leveraged as part of botnets or for launching further attacks, amplifying the overall threat landscape.

1. Immediately check for firmware updates from D-Link addressing this vulnerability; apply patches as soon as they become available. 2. If patches are not yet released, restrict remote access to the router’s management interface by implementing network-level controls such as firewall rules or VPN-only access. 3. Disable any unnecessary remote management features to reduce the attack surface. 4. Monitor network traffic for unusual patterns that may indicate exploitation attempts, including unexpected outbound connections or anomalous behavior from the router. 5. Employ network segmentation to isolate vulnerable devices from critical systems and sensitive data. 6. Use intrusion detection/prevention systems (IDS/IPS) with signatures or heuristics capable of detecting exploitation attempts targeting this vulnerability. 7. Educate network administrators about the vulnerability and ensure incident response plans include steps for compromised network devices. 8. Consider replacing affected devices with models that have a stronger security track record if timely patching is not feasible.