CVE-2025-58733 is a use-after-free vulnerability categorized under CWE-416, found in the Inbox COM Objects component of Microsoft Windows 10 Version 1507 (build 10.0.10240.0). This vulnerability arises when the system improperly manages memory, freeing an object while it is still in use, which can lead to execution of arbitrary code by an attacker. The flaw allows an unauthorized attacker with local access to execute code with potentially elevated privileges. The attack vector is local (AV:L), requiring high attack complexity (AC:H), no privileges (PR:N), but user interaction (UI:R). The scope is unchanged (S:U), and the impact on confidentiality, integrity, and availability is high (C:H/I:H/A:H). The CVSS v3.1 score is 7.0, reflecting a high-severity issue. No known exploits have been reported in the wild, and no official patches have been linked at the time of publication. The vulnerability is particularly relevant for legacy systems still running the initial Windows 10 release, which is no longer supported and lacks modern security mitigations. Exploiting this vulnerability could allow attackers to execute arbitrary code locally, potentially leading to full system compromise. The vulnerability was reserved in early September 2025 and published in mid-October 2025.

This vulnerability poses a significant risk to organizations still operating Windows 10 Version 1507, especially in environments where local user access is possible. Successful exploitation can lead to arbitrary code execution with elevated privileges, compromising system confidentiality, integrity, and availability. This could allow attackers to install malware, steal sensitive data, disrupt operations, or move laterally within networks. Given the high impact on core security properties and the potential for local privilege escalation, affected systems could be fully compromised. The lack of known exploits in the wild currently reduces immediate risk, but the absence of patches and the legacy status of the OS increase long-term exposure. Organizations relying on legacy Windows 10 deployments, particularly in industrial, governmental, or critical infrastructure sectors, face heightened risk due to potential targeted attacks leveraging this vulnerability.

Since no official patches are currently available, organizations should prioritize upgrading affected systems to a supported and fully patched version of Windows 10 or later. Restrict local user access to trusted personnel only and enforce the principle of least privilege to minimize the risk of exploitation. Employ application whitelisting and endpoint protection solutions capable of detecting anomalous behavior related to COM object manipulation. Regularly audit and monitor local user activities for suspicious actions. Consider disabling or restricting the use of Inbox COM Objects if feasible in the environment. Maintain up-to-date backups and incident response plans to quickly recover from potential compromises. Stay alert for official patches or security advisories from Microsoft and apply them promptly once released.