# CVE-2024-43451: Microsoft Windows NTLMv2 Hash Disclosure Spoofing Vulnerability

Source: https://junglewise.ai/threats/cve-2024-43451-microsoft-windows-ntlmv2-hash-disclosure-spoofing-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2024-11-12. Updated: 2026-05-09  
License: CC BY 4.0 with a link back

CVE-2024-43451 · Severity: critical · CVSS 6.5 · Exploited in the wild · Published 2024-11-12

Microsoft Windows contains a spoofing vulnerability that allows for the disclosure of a user's NTLMv2 hash during a file open operation. An attacker can trigger this disclosure to impersonate the user, and the vulnerability has been observed being exploited in the wild.

Technologies: [Microsoft Windows](https://junglewise.ai/threats/technologies/windows). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2024-43451 exploited in the wild?** Yes. CVE-2024-43451 is known to be exploited in the wild, first recorded on 12 November 2024. Treat it as urgent.

**How severe is CVE-2024-43451?** Critical severity, with a CVSS score of 6.5, published 12 November 2024.

**Which products and versions are affected?** Microsoft Windows 10 1507, 1607, 1809, 21H2, 22H2; Microsoft Windows 11 22H2, 23H2, 24H2; Microsoft Windows Server 2008 SP2.

**Is there a fix for CVE-2024-43451?** A patch was published on 2024-11-12: Microsoft released security updates. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2024-43451 attacked?** It is attacked over the network, in an operating system.

**Am I affected by CVE-2024-43451?** Check whether you run Microsoft Windows. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Microsoft Windows 10 1507, 1607, 1809, 21H2, 22H2
- Microsoft Windows 11 22H2, 23H2, 24H2
- Microsoft Windows Server 2008 SP2

## Timeline

- 2024-11-12: disclosed: Vulnerability published by Microsoft and NVD.
- 2024-11-12: patched: Microsoft released security updates.
- 2024-11-12: kev added: Added to CISA Known Exploited Vulnerabilities Catalog.
- 2024-11-12: exploited: Reported as exploited in the wild.

## Related threats

- [Windows BitLocker heap buffer overflow with physical attack](https://junglewise.ai/threats/cve-2026-97015-heap-based-buffer-overflow-in-windows-bitlocker-allows-an)
- [Microsoft Windows Shell type confusion privilege elevation](https://junglewise.ai/threats/cve-2026-97013-access-of-resource-using-incompatible-type-type-confusion-in)
- [Microsoft Windows VMSwitch out-of-bounds read privilege escalation](https://junglewise.ai/threats/cve-2026-97002-out-of-bounds-read-in-windows-vmswitch-allows-an-authorized)
- [Microsoft Windows USM Communication Manager null pointer dereference](https://junglewise.ai/threats/cve-2026-97000-null-pointer-dereference-in-windows-usm-communication-manager)
- [Microsoft Windows Winsock use after free privilege escalation](https://junglewise.ai/threats/cve-2026-96994-use-after-free-in-winsock-allows-an-authorized-attacker-to)