# CVE-2019-1294: Windows Secure Boot Security Feature Bypass Vulnerability

CVE-2019-1294 is fixed in 13 products on 1 platform, first by KB4516058, released September 10, 2019. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2019-1294
- Priority: Routine
- CVSS: 5.3 (Important)
- EPSS: 0.0131
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: yes
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Sep 10, 2019
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2019-1294

## Description

<p>A security feature bypass exists when Windows Secure Boot improperly restricts access to debugging functionality. An attacker who successfully exploited this vulnerability could disclose protected kernel memory.</p> <p>To exploit the vulnerability, an attacker must gain physical access to the target system prior to the next system reboot.</p> <p>The security update addresses the vulnerability by preventing access to certain debugging options when Windows Secure Boot is enabled.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Windows 10 Version 1803 for 32-bit Systems | 17134.1006 | [KB4516058](https://patchblox.com/security/data/fix/microsoft/kb4516058.md) | Sep 10, 2019 |
| Microsoft | Windows 10 Version 1803 for ARM64-based Systems | 17134.1006 | [KB4516058](https://patchblox.com/security/data/fix/microsoft/kb4516058.md) | Sep 10, 2019 |
| Microsoft | Windows 10 Version 1803 for x64-based Systems | 17134.1006 | [KB4516058](https://patchblox.com/security/data/fix/microsoft/kb4516058.md) | Sep 10, 2019 |
| Microsoft | Windows 10 Version 1809 for 32-bit Systems | 17763.737 | [KB4512578](https://patchblox.com/security/data/fix/microsoft/kb4512578.md) | Sep 10, 2019 |
| Microsoft | Windows 10 Version 1809 for ARM64-based Systems | 17763.737 | [KB4512578](https://patchblox.com/security/data/fix/microsoft/kb4512578.md) | Sep 10, 2019 |
| Microsoft | Windows 10 Version 1809 for x64-based Systems | 17763.737 | [KB4512578](https://patchblox.com/security/data/fix/microsoft/kb4512578.md) | Sep 10, 2019 |
| Microsoft | Windows 10 Version 1903 for 32-bit Systems | 18362.356 | [KB4515384](https://patchblox.com/security/data/fix/microsoft/kb4515384.md) | Sep 10, 2019 |
| Microsoft | Windows 10 Version 1903 for ARM64-based Systems | 18362.356 | [KB4515384](https://patchblox.com/security/data/fix/microsoft/kb4515384.md) | Sep 10, 2019 |
| Microsoft | Windows 10 Version 1903 for x64-based Systems | 18362.356 | [KB4515384](https://patchblox.com/security/data/fix/microsoft/kb4515384.md) | Sep 10, 2019 |
| Microsoft | Windows Server 2019 | 17763.737 | [KB4512578](https://patchblox.com/security/data/fix/microsoft/kb4512578.md) | Sep 10, 2019 |
| Microsoft | Windows Server 2019 (Server Core installation) | 17763.737 | [KB4512578](https://patchblox.com/security/data/fix/microsoft/kb4512578.md) | Sep 10, 2019 |
| Microsoft | Windows Server, version 1803  (Server Core Installation) | 17134.1006 | [KB4516058](https://patchblox.com/security/data/fix/microsoft/kb4516058.md) | Sep 10, 2019 |
| Microsoft | Windows Server, version 1903 (Server Core installation) | 18362.356 | [KB4515384](https://patchblox.com/security/data/fix/microsoft/kb4515384.md) | Sep 10, 2019 |

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Data as of 2026-11-08T00:53:09Z 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

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