CVE-2025-27746: 
vulnerability analysis and mitigation

A use-after-free vulnerability in Microsoft Office (CVE-2025-27746) was discovered and disclosed on April 8, 2025. This security flaw affects various Microsoft Office products including Office 2016, Office Online Server, and related Office applications (NVD, Microsoft Support).

The vulnerability is classified as a use-after-free (CWE-416) issue that could allow unauthorized attackers to execute code locally. Microsoft has assigned this vulnerability a CVSS v3.1 base score of 7.8 (High), with a vector string of CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H, indicating local attack vector, low attack complexity, no privileges required, and user interaction required (NVD).

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

Microsoft has released security updates to address this vulnerability. Users can obtain the fix through multiple channels: Microsoft Update, Microsoft Update Catalog, or Microsoft Download Center. For Office 2016 users, the security update KB4484432 is available, while Office Online Server users should apply update KB5002699 (Microsoft Support).