CVE-2026-62722 - Vulnerability Details

- Microsoft Brokering File System Elevation of Privilege Vulnerability

Description

Heap-based buffer overflow in Windows Brokering File System allows an authorized attacker to elevate privileges locally.

Published: 2026-08-11

Score: 7.8 High

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Impact

Heap-based buffer overflow in the Windows Brokering File System allows an authorized local attacker to elevate privileges on the affected systems. This flaw, classified as CWE‑122, allows an authorized local attacker to elevate privileges through an uncontrolled memory area overwrite.

Affected Systems

The vulnerability impacts Windows 11 versions 24H2, 25H2 and 26H1 (both arm64 and x64 builds) as well as Windows Server 2025, including Server Core installations, through the Windows Brokering File System component.

Risk and Exploitability

The CVSS score of 7.8 indicates high severity, while the EPSS score of < 1% suggests a very low exploitation probability; the flaw is exploitable only by a local user with authorized access, and it is not listed in the CISA KEV catalog.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Microsoft

Windows 11 Version 24H2

affected

Version	Status	Constraints
`10.0.26100.0`	affected	< 10.0.26100.9168

Microsoft

Windows 11 Version 25H2

affected

Version	Status	Constraints
`10.0.26200.0`	affected	< 10.0.26200.9168

Microsoft

Windows 11 version 26H1

affected

Version	Status	Constraints
`10.0.28000.0`	affected	< 10.0.28000.2704

Microsoft

Windows Server 2025

affected

Version	Status	Constraints
`10.0.26100.0`	affected	< 10.0.26100.33296

Microsoft

Windows Server 2025 (Server Core installation)

affected

Version	Status	Constraints
`10.0.26100.0`	affected	< 10.0.26100.33296

Configuration 1 [-]

OR	cpe:2.3:o:microsoft:windows_11_24h2:::::::arm64:*
	cpe:2.3:o:microsoft:windows_11_24h2:::::::x64:*
	cpe:2.3:o:microsoft:windows_11_25h2:::::::arm64:*
	cpe:2.3:o:microsoft:windows_11_25h2:::::::x64:*
	cpe:2.3:o:microsoft:windows_11_26h1:::::::arm64:*
	cpe:2.3:o:microsoft:windows_11_26h1:::::::x64:*
	cpe:2.3:o:microsoft:windows_server_2025:::::::x64:*

No data.

Vendor Product Confidence Versions

Microsoft

Windows 11 24h2

86%

Version	Status	Scheme	Platform
`[10.0.26100.0,10.0.26100.9168)`	affected	generic	['arm64-based_systems', 'x64-based_systems']

Microsoft

Windows 11 25h2

86%

Version	Status	Scheme	Platform
`[10.0.26200.0,10.0.26200.9168)`	affected	generic	['arm64-based_systems', 'x64-based_systems']

Microsoft

Windows 11 26h1

86%

Version	Status	Scheme	Platform
`[10.0.28000.0,10.0.28000.2704)`	affected	generic	['arm64-based_systems', 'x64-based_systems']

Microsoft

Windows Server 2025

100%

Version	Status	Scheme	Platform
`[10.0.26100.0,10.0.26100.33296)`	affected	generic	['x64-based_systems']

Microsoft

Windows Server 2025 (server Core Installation)

100%

Version	Status	Scheme	Platform
`[10.0.26100.0,10.0.26100.33296)`	affected	generic	['x64-based_systems']

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Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

Apply the latest Microsoft security update that contains the fix for CVE‑2026‑62722, as detailed in the Microsoft Security Response Center update guide.
Restrict local privileges by ensuring that only trusted accounts can load or interact with drivers on the system.
Disable or uninstall the Windows Brokering File System component if it is not required for current workloads.

Generated by OpenCVE AI on August 17, 2026 at 21:02 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00311.

Exploitation none

Automatable no

Technical Impact total

References

Link	Providers
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62722

History

Mon, 17 Aug 2026 15:45:00 +0000

Type	Values Removed	Values Added
Description	Heap-based buffer overflow in Windows Bind Filter Driver allows an authorized attacker to elevate privileges locally.	Heap-based buffer overflow in Windows Brokering File System allows an authorized attacker to elevate privileges locally.
Title	Windows Bind Filter Driver Elevation of Privilege Vulnerability	Microsoft Brokering File System Elevation of Privilege Vulnerability

Mon, 17 Aug 2026 11:45:00 +0000

Type	Values Removed	Values Added
First Time appeared		Microsoft windows Server 2025 (server Core Installation)
Vendors & Products		Microsoft windows Server 2025 (server Core Installation)

Thu, 13 Aug 2026 15:45:00 +0000

Type	Values Removed	Values Added
First Time appeared		Microsoft windows 11 24h2 Microsoft windows 11 25h2 Microsoft windows 11 26h1
CPEs		cpe:2.3:o:microsoft:windows_11_24h2:::::::arm64:* cpe:2.3:o:microsoft:windows_11_24h2:::::::x64:* cpe:2.3:o:microsoft:windows_11_25h2:::::::arm64:* cpe:2.3:o:microsoft:windows_11_25h2:::::::x64:* cpe:2.3:o:microsoft:windows_11_26h1:::::::arm64:* cpe:2.3:o:microsoft:windows_11_26h1:::::::x64:* cpe:2.3:o:microsoft:windows_server_2025:::::::x64:*
Vendors & Products		Microsoft windows 11 24h2 Microsoft windows 11 25h2 Microsoft windows 11 26h1

Wed, 12 Aug 2026 14:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Tue, 11 Aug 2026 17:15:00 +0000

Type	Values Removed	Values Added
Description		Heap-based buffer overflow in Windows Bind Filter Driver allows an authorized attacker to elevate privileges locally.
Title		Windows Bind Filter Driver Elevation of Privilege Vulnerability
First Time appeared		Microsoft Microsoft windows 11 24h2 Microsoft windows 11 25h2 Microsoft windows 11 26h1 Microsoft windows Server 2025
Weaknesses		CWE-122
CPEs		cpe:2.3:o:microsoft:windows_11_24H2:::::::arm64:* cpe:2.3:o:microsoft:windows_11_25H2:::::::arm64:* cpe:2.3:o:microsoft:windows_11_26H1:::::::x64:* cpe:2.3:o:microsoft:windows_server_2025::::::::
Vendors & Products		Microsoft Microsoft windows 11 24h2 Microsoft windows 11 25h2 Microsoft windows 11 26h1 Microsoft windows Server 2025
References		https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62722
Metrics		cvssV3_1 `{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C'}`

Subscriptions

Microsoft Windows 11 24h2 Windows 11 24h2 Windows 11 25h2 Windows 11 25h2 Windows 11 26h1 Windows 11 26h1 Windows Server 2025 Windows Server 2025 (server Core Installation)

MITRE

Status: PUBLISHED

Assigner: microsoft

Published: 2026-08-11T17:04:10.989Z

Updated: 2026-08-31T20:04:57.128Z

Reserved: 2026-07-14T20:58:12.787Z

Link: CVE-2026-62722

Vulnrichment

Updated: 2026-08-12T13:38:30.350Z

NVD

Status : Modified

Published: 2026-08-11T17:18:23.050

Modified: 2026-08-17T16:17:08.300

Link: CVE-2026-62722

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-08-17T21:15:03Z

Weaknesses

CWE-122
Heap-based Buffer Overflow

Impact

Affected Systems

Risk and Exploitability

Tracking

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

Exploitation none

Automatable no

Technical Impact total

Subscriptions

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