CVE-2025-58736 is a use-after-free vulnerability categorized under CWE-416, found in the Inbox COM Objects of Microsoft 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 arbitrary code execution. In this case, the flaw allows an unauthorized attacker with local access to execute arbitrary code by triggering the use-after-free condition in the COM objects. The vulnerability requires user interaction and has a high attack complexity, meaning exploitation is not trivial but feasible under certain conditions. The CVSS v3.1 base score is 7.0, reflecting high severity with impacts on confidentiality, integrity, and availability. The vector indicates local attack vector (AV:L), high attack complexity (AC:H), no privileges required (PR:N), user interaction required (UI:R), unchanged scope (S:U), and high impact on confidentiality, integrity, and availability (C:H/I:H/A:H). No known exploits are currently reported in the wild, and no official patches have been released as of the publication date. This vulnerability affects legacy Windows 10 installations, which may still be present in some enterprise environments due to compatibility or upgrade constraints.

The exploitation of CVE-2025-58736 can lead to full local code execution, allowing attackers to run arbitrary code with the privileges of the logged-in user. This can result in unauthorized access to sensitive data, modification or deletion of critical files, installation of persistent malware, and disruption of system availability. Organizations relying on Windows 10 Version 1507, especially those with legacy applications or systems that cannot be upgraded easily, face significant risk. The vulnerability could be leveraged by insiders or attackers who gain local access, including through social engineering or physical access. Although remote exploitation is not possible, the impact on affected systems is severe, potentially enabling lateral movement within networks if combined with other vulnerabilities or misconfigurations. The lack of patches increases exposure until mitigations or upgrades are applied.

1. Upgrade affected systems to a supported and fully patched version of Windows 10 or later, as Windows 10 Version 1507 is outdated and no longer supported. 2. Restrict local access to systems running this version by enforcing strict access controls and limiting user privileges to the minimum necessary. 3. Implement application whitelisting and endpoint protection solutions that can detect and block suspicious behaviors related to COM object exploitation. 4. Educate users to avoid executing untrusted code or opening suspicious files that could trigger the vulnerability. 5. Monitor system logs and security alerts for unusual activity indicative of exploitation attempts, such as unexpected COM object usage or crashes. 6. If upgrading is not immediately feasible, consider isolating affected systems from critical networks and sensitive data to reduce potential impact. 7. Stay informed about official patches or workarounds from Microsoft and apply them promptly once available.