CVE-2025-24046 is a use-after-free vulnerability classified under CWE-416, discovered in the Microsoft Streaming Service component of Windows 10 Version 1507 (build 10.0.10240.0). Use-after-free vulnerabilities occur when a program continues to use memory after it has been freed, leading to undefined behavior such as memory corruption, crashes, or code execution. In this case, an authorized local attacker can exploit this flaw to elevate their privileges on the system. The vulnerability requires local access and low attack complexity, with no user interaction needed, making it a potent vector for privilege escalation. Successful exploitation can compromise confidentiality, integrity, and availability by allowing attackers to execute arbitrary code with elevated privileges, potentially gaining full control over the affected system. Although no public exploits are known, the vulnerability is critical for legacy systems still running this early Windows 10 version, which is no longer supported and lacks security updates. The CVSS 3.1 score of 7.8 reflects high severity due to the combination of local attack vector, low complexity, and significant impact on system security. The vulnerability was reserved in January 2025 and published in March 2025, indicating recent discovery and disclosure. No patches are currently linked, emphasizing the importance of upgrading to supported Windows versions or applying any forthcoming fixes from Microsoft.

For European organizations, the primary impact is the risk of local privilege escalation on legacy Windows 10 Version 1507 systems. This can lead to attackers gaining administrative control, enabling them to bypass security controls, access sensitive data, install persistent malware, or disrupt operations. Sectors such as government, healthcare, finance, and critical infrastructure that may still operate legacy systems are particularly vulnerable. The compromise of confidentiality could result in data breaches violating GDPR regulations, leading to legal and financial repercussions. Integrity and availability impacts could disrupt business continuity and damage organizational reputation. Although the vulnerability requires local access, insider threats or attackers who gain initial footholds via other means could leverage this flaw to escalate privileges. The absence of known exploits reduces immediate risk but does not eliminate the threat, especially as exploit development may follow disclosure. Organizations relying on legacy Windows 10 versions face increased exposure until systems are upgraded or patched.

1. Upgrade all systems running Windows 10 Version 1507 (build 10.0.10240.0) to a supported and fully patched Windows version to eliminate exposure to this vulnerability. 2. If upgrading is not immediately feasible, implement strict access controls to limit local user privileges and prevent unauthorized local access. 3. Employ application whitelisting and endpoint detection and response (EDR) solutions to detect and block suspicious privilege escalation attempts. 4. Monitor system logs and security events for unusual activity indicative of exploitation attempts. 5. Isolate legacy systems from critical network segments to reduce potential lateral movement. 6. Regularly review and update security policies to enforce least privilege principles and minimize the number of authorized local users. 7. Stay informed on Microsoft advisories for any forthcoming patches or workarounds related to this vulnerability and apply them promptly. 8. Conduct security awareness training to reduce insider threat risks and improve detection of anomalous behavior.