CVE-2026-70067ImportantFix has a known issueEoPLocal

Windows Win32k Elevation of Privilege Vulnerability

MSRC advisory NVD CVE.org

Assessment

Use after free in Windows Win32 Kernel Subsystem allows an authorized attacker to elevate privileges locally.

Severity: Important
CVSS base score: 7.0CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Impact: Elevation of Privilege
EPSS, next 30 days: Not scored yet
Public exploit code: No Nuclei template lists it
Exploitability: Exploitation Less Likely
Publicly disclosed: No
Customer action: Required: apply the update
Component: Windows Win32 Kernel Subsystem
Weakness: CWE-416: Use After Free
Issued by: Microsoft
Published: 13 Oct 2026 · October 2026
Last revised: 13 Oct 2026

CVSS 3.1 base metricsRed raises the risk · green lowers it

Attack vector: LocalAV:L
Attack complexity: HighAC:H
Privileges required: LowPR:L
User interaction: NoneUI:N
Scope: UnchangedS:U
Confidentiality: HighC:H
Integrity: HighI:H
Availability: HighA:H

Updates that fix it

10 KBs

KB	Type	Restart	Applies to	Known issues	Other CVEs
KB5122871	Security Update	Required	Windows Server 2025, Windows Server 2025 (Server Core installation)	MitigatedUSB audio devices might fail to start or produce no soundResolvedRemote Desktop Services might stop responding after Sept. 2026 security update	All CVEs in KB5122871
KB5122876	Security Update	Required	Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019 and 1 more	MitigatedUSB audio devices might fail to start or produce no soundResolvedRemote Desktop Services might stop responding after Sept. 2026 security update	All CVEs in KB5122876
KB5122878	Security Update	Required	Windows 10 Version 21H2 for ARM64-based Systems, Windows 10 Version 21H2 for x64-based Systems, Windows 10 Version 22H2 for ARM64-based Systems and 1 more	MitigatedUSB audio devices might fail to start or produce no soundResolvedRemote Desktop Services might stop responding after Sept. 2026 security updateResolvedHost folder shares might be unavailable in Hyper-V-based Linux VMs	All CVEs in KB5122878
KB5122880	Security Update	Required	Windows 11 Version 23H2 for ARM64-based Systems, Windows 11 Version 23H2 for x64-based Systems	MitigatedUSB audio devices might fail to start or produce no soundResolvedRemote Desktop Services might stop responding after Sept. 2026 security updateResolvedHost folder shares might be unavailable in Hyper-V-based Linux VMs	All CVEs in KB5122880
KB5122882	Security Update	Required	Windows Server 2022, Windows Server 2022 (Server Core installation)	ResolvedUSB audio devices might fail to start or produce no soundResolvedRemote Desktop Services might stop responding after Sept. 2026 security update	All CVEs in KB5122882
KB5123065	Security Update	Required	Windows Server 2012, Windows Server 2012 (Server Core installation)	None listed	All CVEs in KB5123065
KB5123066	Security Update	Required	Windows Server 2012 R2, Windows Server 2012 R2 (Server Core installation)	None listed	All CVEs in KB5123066
KB5123099	Security Update	Required	Windows 10 Version 1607 for 32-bit Systems, Windows 10 Version 1607 for x64-based Systems, Windows Server 2016 and 1 more	MitigatedUSB audio devices might fail to start or produce no soundResolvedRemote Desktop Services might stop responding after Sept. 2026 security update	All CVEs in KB5123099
KB5124008	Security Update	Required	Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems and 1 more	MitigatedUSB audio devices might fail to start or produce no soundResolvedDomain-joined devices might lose their secure trust relationship with the domainResolvedRemote Desktop Services might stop responding after Sept. 2026 security updateResolvedHost folder shares might be unavailable in Hyper-V-based Linux VMs	All CVEs in KB5124008
KB5124012	Security Update	Required	Windows 11 Version 26H1 for ARM64-based Systems, Windows 11 version 26H1 for x64-based Systems	MitigatedUSB audio devices might fail to start or produce no soundResolvedDomain-joined devices might lose their secure trust relationship with the domainResolvedRemote Desktop Services might stop responding after Sept. 2026 security updateResolvedHost folder shares might be unavailable in Hyper-V-based Linux VMs	All CVEs in KB5124012

Affected products

ESU, Windows

28 affected products

What changed

First observed 14 Oct 2026

No field changes in the recorded history.

Cite this recorded revision to keep the same title, summary, facts and links when the page changes.

A day selects the latest observation by the end of that UTC day; today's selection can change until midnight. History starts when this installation records it.