Live › vulnerability › CVE-2024-43451
Go to dashboardWindows can be tricked into sending a user's NTLMv2 password hash to an attacker when a file is opened. The attacker can then use that hash to impersonate the user.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 3h before NVD. All times on this page are UTC.
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| Microsoft Windows | vendor | – | – |
| microsoft windows 10 1507 | vendor | < 10.0.10240.20826 | 10.0.10240.20826 |
| microsoft windows 10 1607 | vendor | < 10.0.14393.7515 | 10.0.14393.7515 |
| microsoft windows 10 1809 | vendor | < 10.0.17763.6532 | 10.0.17763.6532 |
| microsoft windows 10 21h2 | vendor | < 10.0.19044.5131 | 10.0.19044.5131 |
| microsoft windows 10 22h2 | vendor | < 10.0.19045.5131 | 10.0.19045.5131 |
| microsoft windows 11 22h2 | vendor | < 10.0.22621.4460 | 10.0.22621.4460 |
| microsoft windows 11 23h2 | vendor | < 10.0.22631.4460 | 10.0.22631.4460 |
| microsoft windows 11 24h2 | vendor | < 10.0.26100.2314 | 10.0.26100.2314 |
| microsoft windows server 2008 | vendor | – | – |
| microsoft windows server 2008 | vendor | = r2 | – |
| microsoft windows server 2012 | vendor | – | – |
| microsoft windows server 2012 | vendor | = r2 | – |
| microsoft windows server 2016 | vendor | < 10.0.14393.7515 | 10.0.14393.7515 |
| microsoft windows server 2019 | vendor | < 10.0.17763.6532 | 10.0.17763.6532 |
| microsoft windows server 2022 | vendor | < 10.0.20348.2849 | 10.0.20348.2849 |
| microsoft windows server 2022 23h2 | vendor | < 10.0.25398.1251 | 10.0.25398.1251 |
| microsoft windows server 2025 | vendor | < 10.0.26100.2314 | 10.0.26100.2314 |
Unknown from the sources.
Apply the Microsoft mitigations for CVE-2024-43451 as published by Microsoft, or apply the Microsoft security update for it; the sources do not name the KB or build.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
Microsoft Windows contains an NTLMv2 hash spoofing vulnerability that could result in disclosing a user's NTLMv2 hash to an attacker via a file open operation. The attacker could then leverage this hash to impersonate that user.
CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
This page as .md · .json · in your agent: get_signal("CVE-2024-43451")
CISA KEV catalog, Creative Commons 0 · NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.