CVE-2025-33053 is a vulnerability categorized under CWE-73 (External Control of File Name or Path) found in Microsoft Windows 10 Version 1507 (build 10.0.10240.0). The issue arises from how Internet Shortcut Files (.url files) are processed, allowing an attacker to externally control the file name or path used by the system. This control can be leveraged to execute arbitrary code remotely over a network without requiring any privileges or authentication, though user interaction is necessary to trigger the exploit (e.g., opening or interacting with a malicious shortcut file). The vulnerability has a CVSS v3.1 base score of 8.8, indicating high severity, with attack vector being network-based, low attack complexity, no privileges required, but user interaction needed. The impact covers confidentiality, integrity, and availability, meaning an attacker could fully compromise the affected system. Despite the severity, no known exploits have been reported in the wild, and no official patches have been released as of the publication date. The vulnerability affects a legacy Windows 10 version that is no longer widely supported, but some organizations may still be running it. The flaw highlights the risks of legacy software and the importance of secure handling of file paths and names, especially for files that can be influenced externally such as Internet Shortcut Files.

The potential impact of CVE-2025-33053 is significant for organizations still running Windows 10 Version 1507. Successful exploitation allows remote code execution with full system privileges, enabling attackers to install malware, steal sensitive data, disrupt operations, or move laterally within networks. Because the vulnerability requires no authentication and has a network attack vector, it can be exploited by remote attackers targeting exposed systems or users who open malicious shortcut files received via email or other means. The requirement for user interaction somewhat limits automated mass exploitation but does not eliminate risk, especially in environments with less security awareness. Organizations relying on legacy Windows 10 versions face increased risk due to lack of vendor support and patches. The vulnerability could be leveraged in targeted attacks against critical infrastructure, government, or enterprises with legacy systems, potentially causing data breaches, operational downtime, and reputational damage.

1. Upgrade affected systems to a supported and fully patched version of Windows 10 or later to eliminate the vulnerability. 2. Until upgrades are possible, restrict or disable the processing of Internet Shortcut Files (.url) from untrusted sources via Group Policy or endpoint protection tools. 3. Implement strict network segmentation and firewall rules to limit exposure of vulnerable systems to untrusted networks. 4. Educate users to avoid opening shortcut files from unknown or suspicious sources and to report unexpected files. 5. Employ endpoint detection and response (EDR) solutions to monitor for suspicious activities related to shortcut file handling and code execution. 6. Use application whitelisting to prevent unauthorized code execution triggered by manipulated shortcut files. 7. Regularly audit legacy systems and plan for their timely decommissioning or upgrade to reduce attack surface. 8. Monitor threat intelligence feeds for any emerging exploits targeting this vulnerability to respond promptly.