Microsoft Windows up to Server 2019 Device Guard luafv.sys 7pk security

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability has been found in Microsoft Windows (Operating System) and classified as critical. Affected by this vulnerability is some unknown functionality in the library luafv.sys of the component Device Guard. The manipulation with an unknown input leads to a 7pk security vulnerability. The CWE definition for the vulnerability is CWE-254. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A security feature bypass vulnerability exists in Windows which could allow an attacker to bypass Device Guard when Windows improperly handles calls to the LUAFV driver (luafv.sys), aka 'Windows Security Feature Bypass Vulnerability'.

The bug was discovered 04/09/2019. The weakness was disclosed 04/09/2019 with Qihoo 360 Vulcan Team as confirmed security update guide (Website). The advisory is shared at The public release has been coordinated in cooperation with Microsoft. This vulnerability is known as CVE-2019-0732 since 11/26/2018. The attack can be launched remotely. A single authentication is required for exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1211 for this issue. The advisory points out:

A security feature bypass vulnerability exists in Windows which could allow an attacker to bypass Device Guard when Windows improperly handles calls to the LUAFV driver (luafv.sys). An attacker who successfully exploited this vulnerability could circumvent a User Mode Code Integrity (UMCI) policy on the machine.

The commercial vulnerability scanner Qualys is able to test this issue with plugin 91522 (Microsoft Windows Security Update for April 2019).

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.







CPE 2.3info

CPE 2.2info


VulDB CVSS-B Score: 🔍
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VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.2

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
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Vendor Base Score (Microsoft): 5.3
Vendor Vector (Microsoft): 🔍

NVD Base Score: 7.8
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Class: 7pk security
CWE: CWE-254

Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept
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Threat Intelligenceinfo

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Recommended: Patch
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11/26/2018 🔍
04/09/2019 +134 days 🔍
04/09/2019 +0 days 🔍
04/09/2019 +0 days 🔍
04/09/2019 +0 days 🔍
04/10/2019 +1 days 🔍
08/27/2023 +1600 days 🔍



Advisory: 152536
Organization: Qihoo 360 Vulcan Team
Status: Confirmed
Coordinated: 🔍

CVE: CVE-2019-0732 (🔍)
SecurityFocus: 107702 - Microsoft Windows MS XML CVE-2019-0790 Remote Code Execution Vulnerability

scip Labs:


Created: 04/10/2019 06:54 AM
Updated: 08/27/2023 04:58 PM
Changes: 04/10/2019 06:54 AM (76), 05/27/2020 06:54 PM (6), 08/27/2023 04:58 PM (5)
Complete: 🔍
Cache ID: 44:C6B:40


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