CVEs / CVE-2024-43451
CVE-2024-43451: Microsoft Windows NTLMv2 Hash Disclosure Spoofing Vulnerability
- Known exploited in the CISA KEV catalog since 12 Nov 2024
- medium 6.5 CVSS 3.1 (from the CNA)
- EPSS 84.2% chance of exploitation in the next 30 days, higher than 99% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
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.
Description
NTLM Hash Disclosure Spoofing Vulnerability
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Microsoft Windows Server 2025 | from 10.0.26100.0, before 10.0.26100.2314 | 10.0.26100.2314 |
| Microsoft Windows Server 2025 (Server Core installation) | from 10.0.26100.0, before 10.0.26100.2314 | 10.0.26100.2314 |
| Microsoft Windows 10 Version 1809 | from 10.0.17763.0, before 10.0.17763.6532 | 10.0.17763.6532 |
| Microsoft Windows Server 2019 | from 10.0.17763.0, before 10.0.17763.6532 | 10.0.17763.6532 |
| Microsoft Windows Server 2019 (Server Core installation) | from 10.0.17763.0, before 10.0.17763.6532 | 10.0.17763.6532 |
| Microsoft Windows Server 2022 | from 10.0.20348.0, before 10.0.20348.2849 | 10.0.20348.2849 |
| Microsoft Windows 10 Version 21H2 | from 10.0.19043.0, before 10.0.19044.5131 | 10.0.19044.5131 |
| Microsoft Windows 11 version 22H2 | from 10.0.22621.0, before 10.0.22621.4460 | 10.0.22621.4460 |
| Microsoft Windows 10 Version 22H2 | from 10.0.19045.0, before 10.0.19045.5131 | 10.0.19045.5131 |
| Microsoft Windows 11 version 22H3 | from 10.0.22631.0, before 10.0.22631.4460 | 10.0.22631.4460 |
| Microsoft Windows 11 Version 23H2 | from 10.0.22631.0, before 10.0.22631.4460 | 10.0.22631.4460 |
| Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) | from 10.0.25398.0, before 10.0.25398.1251 | 10.0.25398.1251 |
| Microsoft Windows 11 Version 24H2 | from 10.0.26100.0, before 10.0.26100.2314 | 10.0.26100.2314 |
| Microsoft Windows 10 Version 1507 | from 10.0.10240.0, before 10.0.10240.20826 | 10.0.10240.20826 |
| Microsoft Windows 10 Version 1607 | from 10.0.14393.0, before 10.0.14393.7515 | 10.0.14393.7515 |
| Microsoft Windows Server 2016 | from 10.0.14393.0, before 10.0.14393.7515 | 10.0.14393.7515 |
| Microsoft Windows Server 2016 (Server Core installation) | from 10.0.14393.0, before 10.0.14393.7515 | 10.0.14393.7515 |
| Microsoft Windows Server 2008 Service Pack 2 | from 6.0.6003.0, before 6.0.6003.22966 | 6.0.6003.22966 |
| Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) | from 6.0.6003.0, before 6.0.6003.22966 | 6.0.6003.22966 |
| Microsoft Windows Server 2008 Service Pack 2 | from 6.0.6003.0, before 6.0.6003.22966 | 6.0.6003.22966 |
| Microsoft Windows Server 2008 R2 Service Pack 1 | from 6.1.7601.0, before 6.1.7601.27415 | 6.1.7601.27415 |
| Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) | from 6.1.7601.0, before 6.1.7601.27415 | 6.1.7601.27415 |
| Microsoft Windows Server 2012 R2 | from 6.3.9600.0, before 6.3.9600.22267 | 6.3.9600.22267 |
| Microsoft Windows Server 2012 R2 (Server Core installation) | from 6.3.9600.0, before 6.3.9600.22267 | 6.3.9600.22267 |
Exploitation
| In CISA KEV since | 12 Nov 2024 |
|---|---|
| Due date for US federal agencies | 3 Dec 2024 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. |
Severity
| CVSS 3.1 | 6.5 mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:NScored by the CNA ([email protected]) |
|---|---|
| Weakness | CWE-73 |
References
- CVE-2024-43451 on NVD
- CVE-2024-43451 in the CISA KEV catalog
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-43451 (cited by CISA)
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-43451 Patch, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-43451 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.