KEV Intelligence

Vulnerability report

Exploited in the wild Confirmed confidence In CISA KEV

CVE-2024-43451

NTLM Hash Disclosure Spoofing Vulnerability

Microsoft / Windows Server 2025 · affected before 10.0.26100.2314

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Severity
CVSS 6.5 · Medium
Confidence
Confirmed
Exploit status
Exploited in the wild
EPSS
81.8%
First observed
—
Last observed
—

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2024-43451 is an unauthenticated NTLM Hash Disclosure Spoofing Vulnerability affecting Microsoft Windows Server 2025 and 24 other products.

Is it exploited?

Yes. KEV Intelligence tracks this CVE as a known exploited vulnerability. Confidence is confirmed.

Who is affected?

Microsoft / Windows Server 2025 affected before 10.0.26100.2314.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

NTLM Hash Disclosure Spoofing Vulnerability

NTLM Hash Disclosure Spoofing Vulnerability

Vendor Product Affected Status
Microsoft Windows Server 2025 Before 10.0.26100.2314 Affected
Microsoft Windows Server 2025 (Server Core installation) Before 10.0.26100.2314 Affected
Microsoft Windows 10 Version 1809 Before 10.0.17763.6532 Affected
Microsoft Windows Server 2019 Before 10.0.17763.6532 Affected
Microsoft Windows Server 2019 (Server Core installation) Before 10.0.17763.6532 Affected
Microsoft Windows Server 2022 Before 10.0.20348.2849 Affected
Microsoft Windows 10 Version 21H2 Before 10.0.19044.5131 Affected
Microsoft Windows 11 version 22H2 Before 10.0.22621.4460 Affected
Microsoft Windows 10 Version 22H2 Before 10.0.19045.5131 Affected
Microsoft Windows 11 version 22H3 Before 10.0.22631.4460 Affected
Microsoft Windows 11 Version 23H2 Before 10.0.22631.4460 Affected
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Before 10.0.25398.1251 Affected
Microsoft Windows 11 Version 24H2 Before 10.0.26100.2314 Affected
Microsoft Windows 10 Version 1507 Before 10.0.10240.20826 Affected
Microsoft Windows 10 Version 1607 Before 10.0.14393.7515 Affected
Microsoft Windows Server 2016 Before 10.0.14393.7515 Affected
Microsoft Windows Server 2016 (Server Core installation) Before 10.0.14393.7515 Affected
Microsoft Windows Server 2008 Service Pack 2 Before 6.0.6003.22966 Affected
Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) Before 6.0.6003.22966 Affected
Microsoft Windows Server 2008 Service Pack 2 Before 6.0.6003.22966 Affected
Microsoft Windows Server 2008 R2 Service Pack 1 Before 6.1.7601.27415 Affected
Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) Before 6.1.7601.27415 Affected
Microsoft Windows Server 2012 R2 Before 6.3.9600.22267 Affected
Microsoft Windows Server 2012 R2 (Server Core installation) Before 6.3.9600.22267 Affected
View vendor advisory (opens in new tab)
Published
12 Nov 2024
Exploitation Reported
12 Nov 2024
Attack vector
Remote
Complexity
Low
Privileges
None
User interaction
Required

Tags

windows nessus_scanner cisa microsoft

CVE References

Exploitation evidence

Why KEV Intelligence marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

CISA

Recorded 12 Nov 2024

Independent exploitation attestation added to the KEV Intelligence record.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the KEV Intelligence Pro API.

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Source Added
CISA First 2024-11-12 00:00 UTC

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
0
User-Agents
0

Raw values available in Pro and Enterprise.

Virtual patch status

No KEV Intelligence virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

Scanner Artifacts

Scanner and exploit-framework references linked to this CVE.

Scanner Reference Detected
Nessus https://www.tenable.com/plugins/nessus/210866 02 Jun 2025

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:F/RL:O/RC:C

EPSS

81.8%

Weaknesses

External Control of File Name or Path CWE-73

Timeline

From disclosure to observed exploitation

  1. Nessus plugin available

    Scanner coverage available

  2. CVE published

    Vulnerability disclosed publicly

  3. Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  4. CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2024-43451

Free JSON includes basic KEV fields 
{
  "cve_id": "CVE-2024-43451",
  "confidence": "Confirmed",
  "cvss_score": 6.5,
  "cvss_estimated": false,
  "epss_score": 0.81817,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}

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