#VU101591 Improper Authentication in Windows and Windows Server - CVE-2024-49076

Vulnerability identifier: #VU101591

Vulnerability risk: Low

CVSSv4.0: 5.9 [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/E:U/U:Clear]

CVE-ID: CVE-2024-49076

CWE-ID: CWE-287

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Windows
Operating systems & Components / Operating system
Windows Server
Operating systems & Components / Operating system

Vendor: Microsoft

Description

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.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Windows: before 10 21H2, 10 22H2, 10 1607, 10 1809, 11 22H2, 11 23H2, 10 21H2, 10 21H2, 10 21H2, 10 21H2, 10 21H2, 10 21H2

Windows Server: before 2016, 2022 23H2, 2022, 2025, 2016, 2016, 2016

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

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.