# CVE-2026-81394

## Summary

- **CVE ID:** CVE-2026-81394
- **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-497
- **Published:** Sep 8, 2026
- **Last Modified:** Sep 9, 2026

## Description

Exposure of sensitive system information to an unauthorized control sphere 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 (-)

## References

- [CNA](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-81394)

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