CVE-2025-29810 is a vulnerability classified under CWE-284 (Improper Access Control) found in Microsoft Windows 10 Version 1507 (build 10.0.10240.0), specifically impacting Active Directory Domain Services (AD DS). The flaw allows an attacker who already has some level of authorized access with limited privileges to elevate their privileges over the network without requiring user interaction. The vulnerability arises from insufficient enforcement of access control policies within AD DS, enabling privilege escalation that can compromise the confidentiality, integrity, and availability of domain resources. The CVSS v3.1 score of 7.5 reflects a high-severity issue with network attack vector (AV:N), high complexity (AC:H), requiring low privileges (PR:L), and no user interaction (UI:N). The scope is unchanged (S:U), but the impact on confidentiality, integrity, and availability is high (C:H/I:H/A:H). No known exploits have been reported in the wild, and no patches have been published yet, increasing the urgency for defensive measures. This vulnerability is particularly critical because Active Directory is a core component of enterprise identity and access management, and exploitation could lead to domain-wide compromise. The vulnerability was reserved in March 2025 and published in April 2025, indicating recent discovery and disclosure.

For European organizations, the impact of CVE-2025-29810 is significant due to the widespread use of Windows 10 and Active Directory in enterprise environments. Successful exploitation could allow attackers to escalate privileges from a limited user account to domain administrator level, enabling full control over network resources, user accounts, and sensitive data. This could lead to data breaches, disruption of business operations, and potential ransomware deployment. Critical sectors such as finance, healthcare, government, and energy that rely heavily on Active Directory for identity management are at heightened risk. The network-based attack vector means that attackers could exploit this vulnerability remotely, increasing the threat surface. The lack of available patches and known exploits in the wild means organizations must proactively strengthen defenses to prevent exploitation. Additionally, legacy systems running Windows 10 Version 1507, which is an early release version, may be more prevalent in some organizations due to delayed upgrade cycles, increasing exposure.

1. Immediately identify and inventory all systems running Windows 10 Version 1507 within the network and prioritize their upgrade to a supported, patched version of Windows 10 or later. 2. Implement strict network segmentation to isolate domain controllers and limit access only to necessary administrative hosts and services. 3. Enforce the principle of least privilege rigorously, ensuring users and service accounts have only the minimum required permissions. 4. Monitor Active Directory logs and security event logs for unusual privilege escalation attempts or anomalous authentication patterns. 5. Deploy enhanced endpoint detection and response (EDR) solutions capable of detecting suspicious lateral movement and privilege escalation activities. 6. Restrict remote access to domain controllers using VPNs with multi-factor authentication and limit exposure of Active Directory services to the internet. 7. Prepare incident response plans specifically addressing potential AD compromise scenarios. 8. Stay informed on Microsoft’s advisories and apply patches immediately upon release. 9. Conduct regular security audits and penetration tests focusing on Active Directory security posture. 10. Educate IT staff on the risks associated with legacy Windows versions and the importance of timely upgrades.