CVE-2026-85929
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Incorrect Permission Assignment in Windows Brokering File System Leads to Privilege Escalation
Vulnerability report for CVE-2026-85929, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-11-10
Last updated on: 2026-11-10
Assigner: Microsoft Corporation
Description
Description
Incorrect permission assignment for critical resource in Windows Brokering File System allows an authorized attacker to elevate privileges locally.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| Microsoft | Windows 11 Version 24H2 | From 10.0.26100.0 (inc) to 10.0.26100.9974 (exc) |
| Microsoft | Windows 11 Version 25H2 | From 10.0.26200.0 (inc) to 10.0.26200.9974 (exc) |
| Microsoft | Windows 11 version 26H1 | From 10.0.28000.0 (inc) to 10.0.28000.3501 (exc) |
| Microsoft | Windows 11 Version 26H2 | From 10.0.26300.0 (inc) to 10.0.26300.9974 (exc) |
| Microsoft | Windows Server 2025 | From 10.0.26100.0 (inc) to 10.0.26100.33822 (exc) |
| Microsoft | Windows Server 2025 (Server Core installation) | From 10.0.26100.0 (inc) to 10.0.26100.33822 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-732 | The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors. |
