Improper Authentication in Microsoft Windows and Windows Server - CVE-2024-49076

Vulnerability identifier: #VU101591

CSH Severity: Low

CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2024-49076

CWE-ID: CWE-287

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to bypass authentication process.

The vulnerability exists due to an error when processing authentication requests in Windows Virtualization-Based Security (VBS) Enclave. A local user can load a non-Microsoft DLL into an enclave, leading to arbitrary code execution.

Microsoft Windows
Windows Server

Install updates from vendor's website.

Microsoft Windows - addressed in versions 10 21H2 10.0.19044.5247, 10 22H2 10.0.19045.5247, 10 1607 10.0.14393.7606, 10 1809 10.0.17763.6659, 11 22H2 10.0.22621.4602, 11 23H2 10.0.22631.4602
Windows Server - addressed in versions 2016 10.0.14393.7606, 2022 23H2 10.0.25398.1308, 2022 10.0.20348.2908, 2022 10.0.20348.2966, 2025 10.0.26100.2528, 2025 10.0.26100.2605

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2024-49076

• Improper Authentication in Microsoft Windows Virtualization-Based Security (VBS) Enclave