# CVE-2026-72971

## Summary

- **CVE ID:** CVE-2026-72971
- **Severity:** MEDIUM
- **CVSS Score:** 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)
- **CWE:** CWE-59
- **Published:** Aug 11, 2026
- **Last Modified:** Sep 9, 2026

## Description

Improper link resolution before file access ('link following') in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to perform tampering locally.

## Affected Products

- Microsoft — Windows 11 version 26H1 (10.0.28000.0)

## References

- [CNA](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-72971)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.47%
- **EPSS Percentile:** 39.3

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