CVE-2026-85929: Microsoft Brokering File System Elevation of Privilege Vulnerability
Published Nov 10, 2026
·Updated
Incorrect permission assignment for critical resource in Windows Brokering File System allows an authorized attacker to elevate privileges locally.
Other sources
Microsoft Brokering File System Elevation of Privilege Vulnerability
— Microsoft
Affected Software
10 affected componentsFixes available
Microsoft Windows 11=26H1, >=10.0.28000<10.0.28000.3501
10.0.28000.3501
Microsoft Windows 11=26H2, >=10.0.26300<10.0.26300.9974, >=10.0.26300<10.0.26300.9911
10.0.26300.997410.0.26300.9911
Microsoft Windows 11=26H2, >=10.0.26300<10.0.26300.9974, >=10.0.26300<10.0.26300.9911
10.0.26300.997410.0.26300.9911
Microsoft Windows 11=26H1, >=10.0.28000<10.0.28000.3501
10.0.28000.3501
Microsoft Windows Server 2025<10.0.26100.33822, <10.0.26100.33730
10.0.26100.3382210.0.26100.33730
Microsoft Windows Server 2025<10.0.26100.33822, <10.0.26100.33730
10.0.26100.3382210.0.26100.33730
Microsoft Windows 11=24H2, >=10.0.26100<10.0.26100.9974, >=10.0.26100<10.0.26100.9911
10.0.26100.997410.0.26100.9911
Microsoft Windows 11=25H2, >=10.0.26200<10.0.26200.9974, >=10.0.26200<10.0.26200.9911
10.0.26200.997410.0.26200.9911
Microsoft Windows 11=25H2, >=10.0.26200<10.0.26200.9974, >=10.0.26200<10.0.26200.9911
10.0.26200.997410.0.26200.9911
Microsoft Windows 11=24H2, >=10.0.26100<10.0.26100.9974, >=10.0.26100<10.0.26100.9911
10.0.26100.997410.0.26100.9911
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26300.9974Fixed in 10.0.26300.9911Patch KB5132043 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.28000.3501Patch KB5132059 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33822Fixed in 10.0.26100.33730Patch KB5131077 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26200.9974Fixed in 10.0.26200.9911Patch KB5132043 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.9974Fixed in 10.0.26100.9911Patch KB5132043
Event History
Nov 10, 2026
CVE Published
via Microsoft·04:00 PM
Data Sourced
via Microsoft·04:00 PM
DescriptionSeverityWeakness
Data Sourced
via Microsoft·04:00 PM
Affected Software
CVE Published
via MITRE·06:17 PM
Data Sourced
via MITRE·06:17 PM
DescriptionSeverity
Data Sourced
via NVD·07:21 PM
DescriptionSeverityWeakness