CVE-2025-29841 is a race condition vulnerability classified under CWE-362, found in the Universal Print Management Service component of Microsoft Windows 10 Version 21H2 (build 10.0.19044.0). The flaw arises from improper synchronization when multiple threads or processes concurrently access shared resources, leading to a state where an authorized local attacker can execute code paths that elevate their privileges beyond their assigned rights. This vulnerability does not require user interaction but does require the attacker to have low-level privileges on the system. The race condition can be exploited to compromise confidentiality, integrity, and availability by allowing unauthorized access to sensitive system functions or data. The CVSS v3.1 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). The vulnerability was reserved in March 2025 and published in May 2025, with no known exploits in the wild or patches currently available. The Universal Print Management Service is a critical component in print infrastructure management, and exploitation could allow attackers to gain elevated privileges, potentially leading to full system compromise or lateral movement within networks.

The primary impact of CVE-2025-29841 is local privilege escalation, which can enable attackers with limited access to gain administrative rights on affected Windows 10 systems. This elevation can lead to unauthorized access to sensitive data, modification or deletion of critical files, installation of persistent malware, and disruption of system availability. In enterprise environments, exploitation could facilitate lateral movement, enabling attackers to compromise additional systems and escalate attacks. Organizations relying on Windows 10 21H2 with Universal Print Management Service active are at risk, especially those with multiple users having low-level access. The vulnerability undermines system integrity and confidentiality, potentially exposing sensitive organizational data and critical infrastructure. Although no exploits are known in the wild yet, the high severity and ease of local exploitation make timely mitigation essential to prevent future attacks.

To mitigate CVE-2025-29841, organizations should first monitor for official patches or updates from Microsoft and apply them promptly once available. Until patches are released, administrators should restrict local user privileges to the minimum necessary, especially limiting access to systems running Windows 10 Version 21H2 with Universal Print Management Service enabled. Disable or restrict the Universal Print Management Service if it is not required in the environment to reduce the attack surface. Employ application whitelisting and endpoint detection and response (EDR) solutions to detect unusual privilege escalation attempts. Regularly audit local user accounts and permissions to ensure no unauthorized privilege assignments exist. Additionally, implement strict network segmentation to limit the ability of attackers to move laterally if local privilege escalation occurs. Maintain comprehensive logging and monitoring to detect suspicious activities related to print service operations and privilege escalations.