CVE-2025-21392: 
vulnerability analysis and mitigation

CVE-2025-21392 is a Remote Code Execution vulnerability affecting Microsoft Office that was discovered and disclosed on February 11, 2025. The vulnerability impacts multiple versions of Microsoft Office including Office 2016, Office 2019, Office 2021 LTSC, and Microsoft 365 Apps for Enterprise, in both x86 and x64 architectures (NVD).

The vulnerability has been classified as a Use After Free (CWE-416) issue with a CVSS v3.1 Base Score of 7.8 HIGH (Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H). The attack requires local access and user interaction, but no privileges, while potentially providing high impacts to confidentiality, integrity, and availability (NVD).

If successfully exploited, this vulnerability could allow an attacker to execute arbitrary code with the same privileges as the affected application, potentially leading to full system compromise if the user has administrative rights (Microsoft Support).

Microsoft has released security updates to address this vulnerability. Users are advised to install security update KB5002686 for affected versions of Office. The update is available through Microsoft Update, Microsoft Update Catalog, and the Microsoft Download Center for both 32-bit and 64-bit versions (Microsoft Support).