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CVE-2024-43451

NTLM Hash Disclosure Spoofing Vulnerability

MEDIUM
6.5
CVSS Score
Published: November 12, 2024 at 05:53 PM UTC
Updated: June 17, 2026 at 07:51 AM UTC
16 products affected across 1 vendorWindows Server 2016Windows Server 2019Windows Server 2012

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Severity
MEDIUM6.5
Exploitation
CISA KEV
Exploit prediction
EPSS 84%
SSVC
Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score84.3%

EPSS (Exploit Prediction Scoring System) estimates a 84.3% chance this CVE is exploited in the wild within the next 30 days — higher than 100% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

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.

Required Action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Ransomware Use
Unknown
Added to KEV
Nov 12, 2024
Remediation Due
Dec 3, 2024
692 days overdue
Notes
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-43451
https://nvd.nist.gov/vuln/detail/CVE-2024-43451

Description

NTLM Hash Disclosure Spoofing Vulnerability

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Windows 10 1507· Microsoft
95%
v < 10.0.10240.2082610.0.10240.0 ≤ v < 10.0.10240.2082610.0.10240.0
Affected range stops below 10.0.10240.20826, so it looks safe — our inference, not a vendor statement
Windows 10 1607· Microsoft
95%
v < 10.0.14393.751510.0.14393.0 ≤ v < 10.0.14393.751510.0.14393.0
Affected range stops below 10.0.14393.7515, so it looks safe — our inference, not a vendor statement
Windows 10 1809· Microsoft
95%
v < 10.0.17763.653210.0.17763.0 ≤ v < 10.0.17763.653210.0.17763.0
Affected range stops below 10.0.17763.6532, so it looks safe — our inference, not a vendor statement
Windows 10 21H2· Microsoft
95%
v < 10.0.19044.513110.0.19043.0 ≤ v < 10.0.19044.513110.0.19043.0
Affected range stops below 10.0.19044.5131, so it looks safe — our inference, not a vendor statement
Windows 10 22H2· Microsoft
95%
v < 10.0.19045.513110.0.19045.0 ≤ v < 10.0.19045.513110.0.19045.0
Affected range stops below 10.0.19045.5131, so it looks safe — our inference, not a vendor statement
Windows 11 22H2· Microsoft
95%
v < 10.0.22621.446010.0.22621.0 ≤ v < 10.0.22621.446010.0.22621.0
Affected range stops below 10.0.22621.4460, so it looks safe — our inference, not a vendor statement
Windows 11 23H2· Microsoft
95%
v < 10.0.22631.446010.0.22631.0 ≤ v < 10.0.22631.446010.0.22631.0
Affected range stops below 10.0.22631.4460, so it looks safe — our inference, not a vendor statement
Windows 11 24H2· Microsoft
95%
v < 10.0.26100.231410.0.26100.0 ≤ v < 10.0.26100.231410.0.26100.0
Affected range stops below 10.0.26100.2314, so it looks safe — our inference, not a vendor statement
Windows Server 2008· Microsoft
95%
6.0.6003.0 ≤ v < 6.0.6003.229666.1.7601.0 ≤ v < 6.1.7601.274156.0.6003.06.1.7601.0r2 sp1sp2
Affected range stops below 6.0.6003.22966, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.1.7601.27415, so it looks safe — our inference, not a vendor statement
Windows Server 2012· Microsoft
95%
6.3.9600.0 ≤ v < 6.3.9600.222676.3.9600.0r2
Affected range stops below 6.3.9600.22267, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Vendor AdvisoryPatch
Source: [email protected]
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-43451
US Government Resource
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-43451

SSVC — Action Prioritization

SSVCActiveNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMmicrosoft
Vector?

Quick Info

StatusANALYZED
CWE
CWE-73NVD-CWE-noinfo

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