CVE-2025-53807 is a race condition vulnerability classified under CWE-362, found in the Microsoft Graphics Component of Windows 10 Version 1809 (build 17763.0). This vulnerability arises from improper synchronization when multiple threads or processes concurrently access shared resources, leading to a race condition. An authorized attacker with low privileges on the local machine can exploit this flaw to elevate their privileges, potentially gaining SYSTEM-level access. The vulnerability does not require user interaction but does require local access, which limits remote exploitation but poses a significant risk in environments where attackers can gain initial foothold with limited privileges. The flaw impacts confidentiality, integrity, and availability by allowing attackers to execute arbitrary code with elevated privileges, modify or delete sensitive data, and disrupt system operations. The CVSS 3.1 base score of 7.0 reflects a high severity, with attack vector local (AV:L), attack complexity high (AC:H), privileges required low (PR:L), no user interaction (UI:N), and scope unchanged (S:U). No public exploits are known yet, and no patches have been linked at the time of publication, indicating that organizations should prioritize patch deployment once available. The vulnerability is particularly relevant for legacy systems still running Windows 10 1809, which remains in use in some enterprise and industrial environments due to compatibility or upgrade constraints.

For European organizations, the impact of CVE-2025-53807 can be significant, especially in sectors relying on legacy Windows 10 1809 systems such as manufacturing, healthcare, government, and critical infrastructure. Successful exploitation allows attackers to escalate privileges locally, potentially leading to full system compromise. This can result in unauthorized access to sensitive data, disruption of critical services, and lateral movement within networks. The high severity and ability to compromise confidentiality, integrity, and availability make this a serious threat. Organizations with remote or physical access controls that are weak may see increased risk of local attackers exploiting this vulnerability. Additionally, environments with shared workstations or multi-user systems are particularly vulnerable to privilege escalation attacks. The lack of known exploits currently provides a window for proactive mitigation, but the presence of this vulnerability in a widely deployed OS version means that targeted attacks could emerge, especially against high-value European targets.

1. Prioritize patch management: Monitor Microsoft security advisories closely and deploy patches for Windows 10 Version 1809 as soon as they become available. 2. Restrict local access: Limit the number of users with local access to systems running Windows 10 1809, especially in sensitive environments. 3. Implement least privilege principles: Ensure users operate with the minimum privileges necessary to reduce the impact of potential exploitation. 4. Use application whitelisting and endpoint protection: Employ advanced endpoint detection and response (EDR) solutions to detect unusual privilege escalation attempts. 5. Network segmentation: Isolate legacy systems to limit lateral movement opportunities for attackers. 6. Monitor logs and alerts: Set up monitoring for suspicious activities indicative of privilege escalation or race condition exploitation attempts. 7. Plan for OS upgrades: Develop a roadmap to migrate away from Windows 10 Version 1809 to supported versions with ongoing security updates. 8. Conduct regular security audits and penetration tests focusing on local privilege escalation vectors.