CVE-2025-55685 is a use-after-free vulnerability classified under CWE-416, affecting the Windows PrintWorkflowUserSvc service in Microsoft Windows 11 Version 25H2 (build 10.0.26200.0). This vulnerability occurs when the service improperly manages memory, freeing an object while it is still in use, which can lead to memory corruption. An authorized attacker with local access and low privileges can exploit this flaw to elevate their privileges on the system, potentially gaining SYSTEM-level rights. The vulnerability does not require user interaction but has a high attack complexity due to the need for local access and specific conditions to trigger the flaw. The CVSS v3.1 base score is 7.0, reflecting high severity with impacts on confidentiality, integrity, and availability. No public exploits are known at this time, and no patches have been released yet, though the vulnerability is officially published and reserved since August 2025. The flaw resides in a core Windows service related to print workflow management, which is commonly enabled on Windows 11 systems, making it a significant risk vector for privilege escalation attacks.

For European organizations, this vulnerability poses a significant risk as it allows local attackers to escalate privileges, potentially leading to full system compromise. This can result in unauthorized access to sensitive data, disruption of critical services, and the ability to deploy further malware or ransomware. Organizations with Windows 11 Version 25H2 deployed across their endpoints, especially in sectors like finance, healthcare, government, and critical infrastructure, face increased exposure. The vulnerability undermines system integrity and availability, potentially enabling attackers to bypass security controls and maintain persistence. Given the widespread use of Windows 11 in Europe, the impact could be broad, affecting both enterprise and public sector environments. The lack of current exploits reduces immediate risk but also means organizations must proactively prepare for potential future attacks once exploit code becomes available.

Organizations should prioritize the following mitigations: 1) Monitor official Microsoft channels for patches addressing CVE-2025-55685 and apply them promptly upon release. 2) Restrict local access to systems running Windows 11 Version 25H2, limiting user permissions and enforcing the principle of least privilege to reduce the attack surface. 3) Disable or restrict the PrintWorkflowUserSvc service where feasible, especially on systems that do not require print workflow functionality. 4) Employ endpoint detection and response (EDR) solutions to monitor for anomalous behavior related to privilege escalation attempts and memory corruption exploits. 5) Conduct regular security audits and vulnerability assessments focusing on local privilege escalation vectors. 6) Educate IT staff about this vulnerability to ensure rapid response and containment if exploitation attempts are detected. These targeted actions go beyond generic patching advice and focus on reducing exposure and improving detection capabilities.