CVE-2019-0732

HIGH

Windows - Device Guard Bypass via LUAFV Driver Improper Call Handling

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2019-0732. PoCs published by Google Security Research.

AI-analyzed exploit summary The exploit leverages the LUAFV driver and NtSetCachedSigningLevel to bypass Device Guard by tricking the signing process into applying a cached signature to an arbitrary unsigned file. It involves file virtualization and a race condition to bind the signature to the unsigned file.

Description

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'.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Google Security Research · textlocalwindows
https://www.exploit-db.com/exploits/46716

The exploit leverages the LUAFV driver and NtSetCachedSigningLevel to bypass Device Guard by tricking the signing process into applying a cached signature to an arbitrary unsigned file. It involves file virtualization and a race condition to bind the signature to the unsigned file.

Classification
Working Poc 95%
Attack Type
Auth Bypass
Complexity
Moderate
Reliability
Reliable
Target: Windows 10 1809 with Device Guard
Auth required
Prerequisites: Windows 10 1809 · Device Guard enabled · LUAFV driver loaded · Valid Microsoft-signed file (e.g., notepad.exe) · Unsigned DLL with noticeable DllMain behavior
devstral-2 · analyzed Feb 18, 2026 Full analysis →

References (3)

Core 3
Core References
Exploit, Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/46716/

Scores

CVSS v3 7.8
EPSS 0.0378
EPSS Percentile 88.5%
Attack Vector LOCAL
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-863
Status published
Products (17)
microsoft/windows_10
microsoft/windows_10 1607
microsoft/windows_10 1703
microsoft/windows_10 1709
microsoft/windows_10 1803
microsoft/windows_10 1809
microsoft/windows_7
microsoft/windows_8.1
microsoft/windows_rt_8.1
microsoft/windows_server_2008
... and 7 more
Published Apr 09, 2019
Tracked Since Feb 18, 2026