CVE-2025-11092 is a command injection vulnerability identified in the D-Link DIR-823X router, firmware version 250416. The vulnerability resides in the function sub_412E7C within the /goform/set_switch_settings endpoint. Specifically, the 'port' parameter is improperly sanitized, allowing an attacker to inject arbitrary OS commands remotely. The attack vector is network-based (AV:N), requiring no authentication (PR:L indicates low privileges but no user authentication needed) and no user interaction (UI:N). The vulnerability affects confidentiality, integrity, and availability, as arbitrary commands could lead to data leakage, device compromise, or denial of service. The CVSS 4.0 score is 5.3 (medium), reflecting partial impact on confidentiality, integrity, and availability with relatively low complexity to exploit. Although no active exploits have been reported in the wild, a public exploit is available, increasing the risk of future attacks. The vulnerability is significant for organizations relying on this router model, as it could be used to pivot into internal networks or disrupt operations. The lack of vendor patches at the time of publication necessitates alternative mitigation strategies.

For European organizations, exploitation of this vulnerability could lead to unauthorized command execution on affected routers, potentially allowing attackers to intercept or manipulate network traffic, disrupt connectivity, or gain footholds within internal networks. This can compromise sensitive data confidentiality, degrade network integrity, and cause availability outages. Critical sectors such as telecommunications, government, healthcare, and finance that rely on D-Link DIR-823X routers for network infrastructure are particularly vulnerable. The medium CVSS score indicates a moderate but tangible risk, especially given the remote exploitability without authentication. The presence of a public exploit increases the likelihood of opportunistic attacks targeting unpatched devices. Disruption of network services could impact business continuity and regulatory compliance under European data protection laws.

1. Monitor D-Link’s official channels for firmware updates addressing CVE-2025-11092 and apply patches immediately upon release. 2. Until patches are available, restrict access to the router’s management interface by implementing network segmentation and firewall rules to limit exposure to trusted IP addresses only. 3. Disable remote management features if not strictly necessary to reduce attack surface. 4. Employ intrusion detection/prevention systems (IDS/IPS) with signatures tuned to detect exploitation attempts targeting /goform/set_switch_settings. 5. Conduct regular network traffic analysis to identify anomalous command injection attempts or unusual router behavior. 6. For organizations with large deployments, consider replacing affected devices with models not vulnerable to this issue. 7. Educate IT staff on recognizing signs of compromise related to router exploitation and establish incident response plans specific to network device breaches.