CVE-2024-30096 is an information disclosure vulnerability categorized under CWE-200, affecting the Windows Cryptographic Services in Microsoft Windows 10 Version 1809 (build 10.0.17763.0). This vulnerability arises due to improper handling of sensitive cryptographic information, which can be exposed to unauthorized local users with low privileges. The flaw does not require user interaction to be exploited, but it does require the attacker to have local access to the affected system. The vulnerability impacts confidentiality by potentially leaking sensitive cryptographic material or related data, which could aid attackers in further compromising the system or decrypting protected communications. However, it does not affect the integrity or availability of the system. The CVSS 3.1 base score is 5.5, with an attack vector of local (AV:L), low attack complexity (AC:L), and requiring privileges (PR:L) but no user interaction (UI:N). The scope remains unchanged (S:U), and the impact is high on confidentiality (C:H), none on integrity (I:N) and availability (A:N). There are no known exploits in the wild as of the publication date (June 11, 2024), and no patches have been linked yet, though Microsoft is likely to release updates. This vulnerability is significant because cryptographic services are foundational to system security, and exposure of sensitive cryptographic information can facilitate further attacks such as privilege escalation or data decryption.

For European organizations, this vulnerability poses a moderate risk primarily to confidentiality. Organizations relying on Windows 10 Version 1809, especially those in sectors handling sensitive data such as finance, healthcare, and government, could face increased risk of data leakage. Exposure of cryptographic material could undermine trust in encrypted communications or stored data, potentially leading to regulatory compliance issues under GDPR if personal data is involved. Since exploitation requires local access with low privileges, insider threats or attackers who gain initial footholds could leverage this vulnerability to escalate their capabilities. The lack of impact on integrity and availability limits the risk of system disruption but does not diminish the importance of protecting sensitive cryptographic information. The absence of known exploits reduces immediate risk but should not lead to complacency. Organizations with legacy systems or delayed patching practices are particularly vulnerable.

1. Prioritize upgrading affected systems from Windows 10 Version 1809 to a supported, patched version of Windows 10 or later, as this version is out of mainstream support. 2. Apply any security updates Microsoft releases addressing CVE-2024-30096 as soon as they become available. 3. Restrict local access to critical systems by enforcing strict access controls and monitoring local user activities, especially for accounts with low privileges. 4. Implement robust endpoint detection and response (EDR) solutions to detect unusual access or usage patterns of cryptographic services. 5. Conduct regular audits of cryptographic service logs and system event logs to identify potential exploitation attempts. 6. Educate internal users about the risks of local privilege misuse and enforce least privilege principles. 7. For high-risk environments, consider isolating legacy systems or using virtualization with strict access controls to limit exposure. 8. Maintain an inventory of systems running Windows 10 Version 1809 to ensure timely remediation.