CVE-2024-43451
Microsoft Windows NTLMv2 Hash Disclosure Spoofing Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 3 December 2024). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
NTLM Hash Disclosure Spoofing Vulnerability
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
- EPSS
- 84.27% probability · 100th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 12 November 2024 · due 3 December 2024
- Weakness
- CWE-73
- Affected
- microsoft/windows 10 1507 · microsoft/windows 10 1607 · microsoft/windows 10 1809 · microsoft/windows 10 21h2 · microsoft/windows 10 22h2 · microsoft/windows 11 22h2 · microsoft/windows 11 23h2 · microsoft/windows 11 24h2 · microsoft/windows server 2008 · microsoft/windows server 2012 · microsoft/windows server 2016 · microsoft/windows server 2019 · microsoft/windows server 2022 · microsoft/windows server 2022 23h2 · microsoft/windows server 2025
- Source
- secure@microsoft.com
EPSS moved from 85.4% on 14 October 2026 to 84.3% on 30 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
CISA notes
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-43451 ; https://nvd.nist.gov/vuln/detail/CVE-2024-43451
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-43451Patch, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-43451US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.