CVE-2025-8320 is a high-severity remote code execution vulnerability affecting Tesla Wall Connector devices, specifically version 24.44.1. The root cause lies in improper validation of the HTTP Content-Length header during input parsing, classified under CWE-1284 (Improper Validation of Specified Quantity in Input). This flaw allows a network-adjacent attacker to send specially crafted HTTP requests with manipulated Content-Length headers that cause the device to access memory beyond the allocated buffer boundaries. Such out-of-bounds memory access can be exploited to execute arbitrary code within the context of the Wall Connector device. Notably, exploitation does not require authentication or user interaction, significantly lowering the barrier for attackers. The vulnerability was identified and assigned by the Zero Day Initiative (ZDI) as ZDI-CAN-26300 and has a CVSS v3.0 score of 8.8, indicating high impact on confidentiality, integrity, and availability. The Tesla Wall Connector is a network-connected electric vehicle charging device, and successful exploitation could allow attackers to compromise the device firmware, potentially leading to unauthorized control over charging operations or pivoting into connected networks. Although no known exploits are currently observed in the wild, the vulnerability’s characteristics make it a critical concern for organizations deploying Tesla Wall Connectors in their infrastructure.

For European organizations, this vulnerability poses significant risks, especially for enterprises, commercial properties, and public infrastructure that utilize Tesla Wall Connectors for electric vehicle charging. Exploitation could lead to unauthorized control over charging sessions, disruption of charging availability, or use of the compromised device as a foothold for lateral movement within corporate or facility networks. This could result in operational downtime, safety hazards if charging is manipulated, and potential data breaches if attackers leverage the device to access broader network resources. Given the increasing adoption of electric vehicles and associated charging infrastructure in Europe, the impact extends to critical infrastructure sectors, including transportation, energy, and commercial real estate. Furthermore, the lack of authentication requirement and ease of exploitation increase the likelihood of targeted attacks or opportunistic scanning by threat actors. The confidentiality, integrity, and availability of affected systems are all at risk, potentially leading to financial losses, reputational damage, and regulatory compliance issues under frameworks such as GDPR and NIS Directive.

1. Immediate deployment of vendor-provided patches or firmware updates once available is critical. Since no patch links are currently provided, organizations should monitor Tesla’s official security advisories and update promptly. 2. Implement network segmentation to isolate Tesla Wall Connectors from critical IT and OT networks, limiting attacker lateral movement if a device is compromised. 3. Employ network-level protections such as firewalls and intrusion detection/prevention systems (IDS/IPS) configured to detect and block anomalous HTTP requests, especially those with suspicious Content-Length headers. 4. Restrict network access to Wall Connectors by allowing only trusted management and monitoring systems to communicate with them, minimizing exposure to network-adjacent attackers. 5. Conduct regular security assessments and vulnerability scans on connected devices to identify unpatched or vulnerable Wall Connectors. 6. Monitor device logs and network traffic for unusual activity indicative of exploitation attempts. 7. Engage with Tesla support or authorized service providers for guidance on secure configuration and incident response procedures related to Wall Connectors.