CVE-2024-30094 is a high-severity heap-based buffer overflow vulnerability (CWE-122) affecting the Windows Routing and Remote Access Service (RRAS) component in Microsoft Windows 10 Version 1809 (build 10.0.17763.0). RRAS is a critical networking service that provides routing and remote access capabilities, including VPN and dial-up services. This vulnerability allows an unauthenticated attacker with local access (AV:L) to execute code remotely by triggering a heap overflow condition in the RRAS service. The flaw arises from improper handling of input data within RRAS, leading to memory corruption. Exploitation requires low attack complexity (AC:L), no privileges (PR:N), but does require user interaction (UI:R), such as convincing a user to initiate a connection or interaction that triggers the vulnerability. Successful exploitation can result in full compromise of confidentiality, integrity, and availability (C:H/I:H/A:H) of the affected system, enabling arbitrary code execution with system-level privileges. The vulnerability scope is unchanged (S:U), meaning the impact is limited to the vulnerable component and does not extend beyond the local system boundary. No known exploits are currently reported in the wild, but the high CVSS score of 7.8 and critical impact make timely patching essential. The vulnerability was publicly disclosed on June 11, 2024, with the reservation date of March 22, 2024. No official patches or mitigations have been linked yet, indicating organizations must monitor vendor updates closely. Given the nature of RRAS as a networking service, this vulnerability could be exploited in enterprise environments where Windows 10 Version 1809 is still in use, especially in legacy systems or environments with remote access enabled.

For European organizations, the impact of CVE-2024-30094 is significant. Many enterprises and public sector entities still operate legacy Windows 10 Version 1809 systems, particularly in critical infrastructure, government, and industrial control environments where upgrading is slow due to operational constraints. Exploitation could lead to complete system compromise, data breaches, disruption of network services, and lateral movement within corporate networks. Confidentiality breaches could expose sensitive personal data protected under GDPR, leading to regulatory penalties and reputational damage. Integrity and availability impacts could disrupt business operations, especially in sectors relying on RRAS for VPN connectivity and remote access, such as finance, healthcare, and manufacturing. The requirement for user interaction reduces the likelihood of mass automated exploitation but does not eliminate targeted attacks, including spear-phishing or social engineering campaigns aimed at privileged users. The absence of known exploits in the wild provides a window for proactive defense, but the high severity demands immediate attention to prevent potential exploitation by advanced threat actors.

1. Immediate inventory and identification of all systems running Windows 10 Version 1809, focusing on those with RRAS enabled. 2. Disable RRAS service on systems where it is not required to reduce the attack surface. 3. Implement strict network segmentation and access controls to limit exposure of RRAS-enabled systems, especially from untrusted networks. 4. Educate users about the risks of interacting with unsolicited network connection prompts or suspicious remote access requests to mitigate the user interaction requirement. 5. Monitor network and system logs for unusual RRAS activity or signs of exploitation attempts. 6. Apply vendor patches promptly once released; in the meantime, consider deploying host-based intrusion prevention systems (HIPS) or endpoint detection and response (EDR) solutions with signatures or heuristics targeting heap overflow exploitation techniques. 7. Employ application whitelisting and privilege restriction to limit the impact of potential code execution. 8. Regularly update and test incident response plans to handle potential exploitation scenarios involving RRAS.