NTLMv2 hash disclosure in Microsoft Windows MSHTML component



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2024-43451
CWE-ID CWE-200
Exploitation vector Network
Public exploit This vulnerability is being exploited in the wild.
Vulnerable software
 Microsoft Internet Explorer
Client/Desktop applications / Web browsers

Windows Server
Operating systems & Components / Operating system

Windows
Operating systems & Components / Operating system

Vendor Microsoft

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Information disclosure

EUVDB-ID: #VU100276

Risk: Medium

CVSSv3.1: 6.2 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:H/RL:O/RC:C]

CVE-ID: CVE-2024-43451

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to disclosure of a user's NTLMv2 hash. A remote attacker can trick the victim into visiting a specially crafted website and obtain their NTLMv2 hash.

Note, the vulnerability is being actively exploited in the wild.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft Internet Explorer: 11 - 11.1790.17763.0

Windows Server: before 2008 R2 6.1.7601.27415, 2008 6.0.6003.22966, 2012 R2 6.3.9600.22267, 2012 6.2.9200.25165, 2022 10.0.20348.2849, 2022 23H2 10.0.25398.1251, 2025 10.0.26100.2240, 2025 10.0.26100.2314, 2008 R2 6.1.7601.27415, 2008 R2 6.1.7601.27415, 2008 R2 6.1.7601.27415

Windows: before 10 21H2 10.0.19044.5131, 10 22H2 10.0.19045.5131, 10 1507 10.0.10240.20826, 10 1607 10.0.14393.7515, 10 1809 10.0.17763.6532, 11 22H2 10.0.22621.4460, 11 23H2 10.0.22631.4460, 11 24H2 10.0.26100.2240, 11 24H2 10.0.26100.2314, 10 21H2 10.0.19044.5131, 10 21H2 10.0.19044.5131, 10 21H2 10.0.19044.5131, 10 21H2 10.0.19044.5131, 10 21H2 10.0.19044.5131, 10 21H2 10.0.19044.5131, 10 21H2 10.0.19044.5131

CPE2.3 External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2024-43451


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.



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