# CVE-2017-11899: Device Guard Security Feature Bypass Vulnerability CVE-2017-11899 is fixed in 13 products on 1 platform, first by KB4053578, released December 12, 2017. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2017-11899 - Priority: High - CVSS: 7.5 (Important) - EPSS: 0.0584 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Vendor exploitability assessment: Exploitation Less Likely - Published: Jan 25, 2018 - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2017-11899 ## Description

A security feature bypass exists when Device Guard incorrectly validates an untrusted file. An attacker who successfully exploited this vulnerability could make an unsigned file appear to be signed. Because Device Guard relies on the signature to determine the file is non-malicious, Device Guard could then allow a malicious file to execute.

In an attack scenario, an attacker could make an untrusted file appear to be a trusted file.

The update addresses the vulnerability by correcting how Device Guard handles untrusted files.

## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Windows 10 Version 1511 for 32-bit Systems | 10586.1295 | [KB4053578](https://patchblox.com/security/data/fix/microsoft/kb4053578.md) | Dec 12, 2017 | | Microsoft | Windows 10 Version 1511 for x64-based Systems | 10586.1295 | [KB4053578](https://patchblox.com/security/data/fix/microsoft/kb4053578.md) | Dec 12, 2017 | | Microsoft | Windows 10 Version 1607 for 32-bit Systems | 14393.1944 | [KB4053579](https://patchblox.com/security/data/fix/microsoft/kb4053579.md) | Dec 12, 2017 | | Microsoft | Windows 10 Version 1607 for x64-based Systems | 14393.1944 | [KB4053579](https://patchblox.com/security/data/fix/microsoft/kb4053579.md) | Dec 12, 2017 | | Microsoft | Windows 10 Version 1703 for 32-bit Systems | 15063.786 | [KB4053580](https://patchblox.com/security/data/fix/microsoft/kb4053580.md) | Dec 12, 2017 | | Microsoft | Windows 10 Version 1703 for x64-based Systems | 15063.786 | [KB4053580](https://patchblox.com/security/data/fix/microsoft/kb4053580.md) | Dec 12, 2017 | | Microsoft | Windows 10 Version 1709 for 32-bit Systems | 16299.125 | [KB4054517](https://patchblox.com/security/data/fix/microsoft/kb4054517.md) | Dec 12, 2017 | | Microsoft | Windows 10 Version 1709 for x64-based Systems | 16299.125 | [KB4054517](https://patchblox.com/security/data/fix/microsoft/kb4054517.md) | Dec 12, 2017 | | Microsoft | Windows 10 for 32-bit Systems | 10240.17709 | [KB4053581](https://patchblox.com/security/data/fix/microsoft/kb4053581.md) | Dec 12, 2017 | | Microsoft | Windows 10 for x64-based Systems | 10240.17709 | [KB4053581](https://patchblox.com/security/data/fix/microsoft/kb4053581.md) | Dec 12, 2017 | | Microsoft | Windows Server 2016 | 14393.1944 | [KB4053579](https://patchblox.com/security/data/fix/microsoft/kb4053579.md) | Dec 12, 2017 | | Microsoft | Windows Server 2016 (Server Core installation) | 14393.1944 | [KB4053579](https://patchblox.com/security/data/fix/microsoft/kb4053579.md) | Dec 12, 2017 | | Microsoft | Windows Server, version 1709 (Server Core Installation) | 16299.125 | [KB4054517](https://patchblox.com/security/data/fix/microsoft/kb4054517.md) | Dec 12, 2017 | --- 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