# CVE-2026-69578: Windows Kernel Elevation of Privilege Vulnerability CVE-2026-69578 is fixed in 30 products on 1 platform, first by KB5123099, released September 8, 2026. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2026-69578 - Priority: High - CVSS: 7.0 (Important) - EPSS: 0.0026 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Vendor exploitability assessment: Exploitation Less Likely - Published: Sep 8, 2026 - Weakness: Numeric Truncation Error - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69578 ## Description

Numeric truncation error in Windows Kernel allows an authorized attacker to elevate privileges locally.

## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Windows 10 Version 1607 for 32-bit Systems | 14393.9512 | [KB5123099](https://patchblox.com/security/data/fix/microsoft/kb5123099.md) | Sep 8, 2026 | | Microsoft | Windows 10 Version 1607 for x64-based Systems | 14393.9512 | [KB5123099](https://patchblox.com/security/data/fix/microsoft/kb5123099.md) | Sep 8, 2026 | | Microsoft | Windows 10 Version 1809 for 32-bit Systems | 17763.9245 | [KB5122876](https://patchblox.com/security/data/fix/microsoft/kb5122876.md) | Sep 8, 2026 | | Microsoft | Windows 10 Version 1809 for x64-based Systems | 17763.9245 | [KB5122876](https://patchblox.com/security/data/fix/microsoft/kb5122876.md) | Sep 8, 2026 | | Microsoft | Windows 10 Version 21H2 for 32-bit Systems | | [KB5122878](https://patchblox.com/security/data/fix/microsoft/kb5122878.md) | Sep 8, 2026 | | Microsoft | Windows 10 Version 21H2 for ARM64-based Systems | | [KB5122878](https://patchblox.com/security/data/fix/microsoft/kb5122878.md) | Sep 8, 2026 | | Microsoft | Windows 10 Version 21H2 for x64-based Systems | | [KB5122878](https://patchblox.com/security/data/fix/microsoft/kb5122878.md) | Sep 8, 2026 | | Microsoft | Windows 10 Version 22H2 for 32-bit Systems | | [KB5122878](https://patchblox.com/security/data/fix/microsoft/kb5122878.md) | Sep 8, 2026 | | Microsoft | Windows 10 Version 22H2 for ARM64-based Systems | | [KB5122878](https://patchblox.com/security/data/fix/microsoft/kb5122878.md) | Sep 8, 2026 | | Microsoft | Windows 10 Version 22H2 for x64-based Systems | | [KB5122878](https://patchblox.com/security/data/fix/microsoft/kb5122878.md) | Sep 8, 2026 | | Microsoft | Windows 11 Version 23H2 for ARM64-based Systems | 22631.7582 | [KB5122880](https://patchblox.com/security/data/fix/microsoft/kb5122880.md) | Sep 8, 2026 | | Microsoft | Windows 11 Version 23H2 for x64-based Systems | 22631.7582 | [KB5122880](https://patchblox.com/security/data/fix/microsoft/kb5122880.md) | Sep 8, 2026 | | Microsoft | Windows 11 Version 24H2 for ARM64-based Systems | | [KB5124008](https://patchblox.com/security/data/fix/microsoft/kb5124008.md) | Sep 8, 2026 | | Microsoft | Windows 11 Version 24H2 for x64-based Systems | | [KB5124008](https://patchblox.com/security/data/fix/microsoft/kb5124008.md) | Sep 8, 2026 | | Microsoft | Windows 11 Version 25H2 for ARM64-based Systems | | [KB5124008](https://patchblox.com/security/data/fix/microsoft/kb5124008.md) | Sep 8, 2026 | | Microsoft | Windows 11 Version 25H2 for x64-based Systems | | [KB5124008](https://patchblox.com/security/data/fix/microsoft/kb5124008.md) | Sep 8, 2026 | | Microsoft | Windows 11 Version 26H1 for ARM64-based Systems | 28000.2954 | [KB5124012](https://patchblox.com/security/data/fix/microsoft/kb5124012.md) | Sep 8, 2026 | | Microsoft | Windows 11 version 26H1 for x64-based Systems | 28000.2954 | [KB5124012](https://patchblox.com/security/data/fix/microsoft/kb5124012.md) | Sep 8, 2026 | | Microsoft | Windows Server 2012 | | [KB5123065](https://patchblox.com/security/data/fix/microsoft/kb5123065.md) | Sep 8, 2026 | | Microsoft | Windows Server 2012 (Server Core installation) | | [KB5123065](https://patchblox.com/security/data/fix/microsoft/kb5123065.md) | Sep 8, 2026 | | Microsoft | Windows Server 2012 R2 | | [KB5123066](https://patchblox.com/security/data/fix/microsoft/kb5123066.md) | Sep 8, 2026 | | Microsoft | Windows Server 2012 R2 (Server Core installation) | | [KB5123066](https://patchblox.com/security/data/fix/microsoft/kb5123066.md) | Sep 8, 2026 | | Microsoft | Windows Server 2016 | 14393.9512 | [KB5123099](https://patchblox.com/security/data/fix/microsoft/kb5123099.md) | Sep 8, 2026 | | Microsoft | Windows Server 2016 (Server Core installation) | 14393.9512 | [KB5123099](https://patchblox.com/security/data/fix/microsoft/kb5123099.md) | Sep 8, 2026 | | Microsoft | Windows Server 2019 | 17763.9245 | [KB5122876](https://patchblox.com/security/data/fix/microsoft/kb5122876.md) | Sep 8, 2026 | | Microsoft | Windows Server 2019 (Server Core installation) | 17763.9245 | [KB5122876](https://patchblox.com/security/data/fix/microsoft/kb5122876.md) | Sep 8, 2026 | | Microsoft | Windows Server 2022 | 20348.5622 | [KB5122882](https://patchblox.com/security/data/fix/microsoft/kb5122882.md) | Sep 8, 2026 | | Microsoft | Windows Server 2022 (Server Core installation) | 20348.5622 | [KB5122882](https://patchblox.com/security/data/fix/microsoft/kb5122882.md) | Sep 8, 2026 | | Microsoft | Windows Server 2025 | 26100.33438 | [KB5122871](https://patchblox.com/security/data/fix/microsoft/kb5122871.md) | Sep 8, 2026 | | Microsoft | Windows Server 2025 (Server Core installation) | 26100.33438 | [KB5122871](https://patchblox.com/security/data/fix/microsoft/kb5122871.md) | Sep 8, 2026 | --- Data as of 2026-11-07T12:40:37Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo