CVE-2024-43451

CVE-2024-43451 is a medium-severity vulnerability in Microsoft Windows 10 1507 with a CVSS 3.x base score of 6.5. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2024-11-12). The underlying weakness is classified as CWE-73.

Key facts

• Severity: Medium (CVSS 3.x base score 6.5)
• EPSS exploit prediction: 82% (100th percentile)
• Actively exploited: Yes — listed in CISA KEV (added 2024-11-12)
• EU (EUVD) id: EUVD-2024-40720
• EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2024-11-12)
• Weakness: CWE-73
• Affected product: Microsoft Windows 10 1507
• Published: 2024-11-12
• Last modified: 2026-06-17

Description

NTLM Hash Disclosure Spoofing Vulnerability

Frequently asked questions

What is CVE-2024-43451?

NTLM Hash Disclosure Spoofing Vulnerability

How severe is CVE-2024-43451?

CVE-2024-43451 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2024-43451 being actively exploited?

Yes. CVE-2024-43451 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2024-11-12, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2024-43451?

CVE-2024-43451 primarily affects Microsoft Windows 10 1507. In total, 28 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2024-43451?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2024-43451 have an EU (EUVD) identifier?

Yes. CVE-2024-43451 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-40720. It is also flagged as exploited in the EUVD (since 2024-11-12).

When was CVE-2024-43451 published?

CVE-2024-43451 was published on 2024-11-12 and last updated on 2026-06-17.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-43451
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-43451

Affected products (28)

• cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*

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