CVE-2025-49699: 
vulnerability analysis and mitigation

A use-after-free vulnerability has been identified in Microsoft Office (CVE-2025-49699) that allows an unauthorized attacker to execute code locally. The vulnerability was discovered and disclosed on July 8, 2025, affecting various Microsoft Office products including Office 2016, Office 2019, Microsoft 365 Apps, and Office Long Term Servicing Channel versions (MITRE CVE, NVD).

The vulnerability has been assigned a CVSS v3.1 base score of 7.0 (High) with the following vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H. This indicates that the vulnerability requires local access, has high attack complexity, needs no privileges, requires user interaction, and can result in high impacts to confidentiality, integrity, and availability. The vulnerability is classified as CWE-416 (Use After Free) (NVD).

If successfully exploited, this vulnerability could allow an unauthorized attacker to execute code locally on the affected system, potentially leading to complete system compromise with high impacts on confidentiality, integrity, and availability of the affected system (NVD).

Microsoft has released security updates to address this vulnerability as part of the July 2025 security updates. Affected users are advised to apply the latest security updates through Windows Update or Microsoft Update Catalog (Microsoft Security).