# CVE-2026-81401

## Summary

- **CVE ID:** CVE-2026-81401
- **Severity:** MEDIUM
- **CVSS Score:** 5.5 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C)
- **CWE:** CWE-843
- **Published:** Sep 8, 2026
- **Last Modified:** Sep 10, 2026

## Description

Access of resource using incompatible type ('type confusion') in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.

## Affected Products

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

## References

- [CNA](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-81401)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.51%
- **EPSS Percentile:** 41.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._