Use after free in Windows Defender Firewall Service allows an authorized attacker to elevate privileges locally.

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Windows 11 23h2 Subscribe
Windows 11 24h2 Subscribe
Windows 11 25h2 Subscribe
Windows 11 26h1 Subscribe
Windows 11 Version 26h2 For Arm64-based Systems Subscribe
Windows Server 2025 Subscribe
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Fixes

Solution

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Workaround

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History

Tue, 13 Oct 2026 22:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 13 Oct 2026 19:15:00 +0000

Type Values Removed Values Added
Description Use after free in Windows Defender Firewall Service allows an authorized attacker to elevate privileges locally.
Title Windows Defender Firewall Service Elevation of Privilege Vulnerability
First Time appeared Microsoft
Microsoft windows 11 23h2
Microsoft windows 11 24h2
Microsoft windows 11 25h2
Microsoft windows 11 26h1
Microsoft windows 11 Version 26h2 For Arm64-based Systems
Microsoft windows Server 2025
Weaknesses CWE-416
CPEs cpe:2.3:a:microsoft:windows_11_version_26h2_for_arm64-based_systems:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*
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 23h2
Microsoft windows 11 24h2
Microsoft windows 11 25h2
Microsoft windows 11 26h1
Microsoft windows 11 Version 26h2 For Arm64-based Systems
Microsoft windows Server 2025
References
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'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-10-13T22:21:19.183Z

Reserved: 2026-08-31T22:35:53.585Z

Link: CVE-2026-83679

cve-icon Vulnrichment

Updated: 2026-10-13T20:36:22.807Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-13T19:20:10.103

Modified: 2026-10-13T21:18:34.677

Link: CVE-2026-83679

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses