Cloud Vulnerability DB
An open project to list all known cloud vulnerabilities and Cloud Service Provider security issues
Vulnerability DatabaseCVE-2025-21386
CVE-2025-21386:
vulnerability analysis and mitigation
Overview
Microsoft Excel Remote Code Execution Vulnerability (CVE-2025-21386) was disclosed on February 11, 2025. This vulnerability affects multiple versions of Microsoft Excel and Office products, including Microsoft 365 Apps Enterprise, Excel 2016, Office 2019, Office 2021 LTSC, Office 2024 LTSC, and Office Online Server (NVD).
Technical details
The vulnerability has been assigned a CVSS v3.1 base score of 7.8 (HIGH) with the following vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. Microsoft has classified this as a Use After Free (CWE-416) vulnerability (NVD).
Impact
If successfully exploited, this vulnerability could allow an attacker to execute arbitrary code with the same privileges as the compromised user. The vulnerability affects confidentiality, integrity, and availability of the system, as indicated by the high impact scores across all three metrics (NVD).
Mitigation and workarounds
Microsoft has released security updates to address this vulnerability. Users are advised to apply the security update KB5002687 for Excel 2016 and KB5002679 for Office Online Server. The updates are available through Microsoft Update, Microsoft Update Catalog, and Microsoft Download Center (Microsoft Support).
Additional resources
Source: This report was generated using AI
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