# CVE-2025-54899

## Summary

- **CVE ID:** CVE-2025-54899
- **Severity:** HIGH
- **CVSS Score:** 7.8 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
- **CWE:** CWE-590
- **Published:** Sep 9, 2025
- **Last Modified:** Mar 12, 2026

## Description

Free of memory not on the heap in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

## Affected Products

- Microsoft — Microsoft 365 Apps for Enterprise (16.0.1)
- Microsoft — Microsoft Excel 2016 (16.0.0.0)
- Microsoft — Microsoft Office 2019 (19.0.0)
- Microsoft — Microsoft Office LTSC 2021 (16.0.1)
- Microsoft — Microsoft Office LTSC 2024 (16.0.0)
- Microsoft — Microsoft Office LTSC for Mac 2021 (16.0.1)
- Microsoft — Microsoft Office LTSC for Mac 2024 (16.0.0)

## References

- [CNA](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-54899)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.58%
- **EPSS Percentile:** 45.7

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._