CVE-2025-62462 is a buffer over-read vulnerability classified under CWE-126 affecting the Windows Projected File System (ProjFS) in Microsoft Windows 10 Version 1809 (build 10.0.17763.0). The vulnerability arises when the ProjFS component improperly handles memory boundaries, allowing an attacker with authorized local access to read beyond allocated buffers. This can lead to disclosure of sensitive information, corruption of memory, and ultimately privilege escalation by enabling the attacker to execute code with elevated permissions. The attack vector is local, requiring the attacker to have some level of access (low privileges) but does not require user interaction, increasing the risk in environments where multiple users share systems or where local accounts are not tightly controlled. The vulnerability affects confidentiality, integrity, and availability, as it can be leveraged to compromise system security comprehensively. Although no exploits have been observed in the wild, the lack of an official patch at the time of publication means systems remain vulnerable. The CVSS v3.1 base score of 7.8 reflects the high impact on system security with relatively low attack complexity and privileges required. The vulnerability is particularly concerning for enterprise and government environments that rely on Windows 10 1809, which remains in use in many organizations despite newer Windows versions being available. The absence of patch links suggests that mitigation relies on workarounds and access control until Microsoft releases an update.

The potential impact of CVE-2025-62462 is significant for organizations worldwide, especially those still operating Windows 10 Version 1809. Successful exploitation allows an attacker with local access to escalate privileges, potentially gaining SYSTEM-level control. This can lead to full system compromise, unauthorized access to sensitive data, disruption of services, and the ability to deploy further malware or ransomware. The vulnerability threatens confidentiality by enabling unauthorized memory reads, integrity by allowing code execution with elevated privileges, and availability by potentially causing system instability or denial of service. Organizations with shared workstations, weak local account controls, or those that allow untrusted users local access are at higher risk. The lack of known exploits in the wild currently reduces immediate risk but also means attackers may develop exploits rapidly once details are public. The impact is heightened in sectors with high-value targets such as government, finance, healthcare, and critical infrastructure, where privilege escalation can facilitate lateral movement and data exfiltration.

To mitigate CVE-2025-62462 effectively, organizations should: 1) Restrict local access to Windows 10 Version 1809 systems by enforcing strict user account controls and limiting the number of users with local login privileges. 2) Implement application whitelisting and endpoint detection to monitor and block suspicious activities indicative of privilege escalation attempts. 3) Use least privilege principles to minimize the rights of local users and service accounts. 4) Monitor system logs for unusual memory access patterns or privilege escalation indicators. 5) Prepare to deploy Microsoft’s official patch immediately upon release and test it in controlled environments before wide deployment. 6) Consider upgrading affected systems to a newer, supported Windows version where this vulnerability is not present. 7) Employ network segmentation to isolate critical systems and reduce the risk of lateral movement if a local compromise occurs. 8) Educate administrators and users about the risks of local privilege escalation vulnerabilities and enforce strong endpoint security policies.