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CVE-2024-43451

Microsoft Windows NTLMv2 Hash Disclosure Spoofing

6.5 MEDIUMActively exploited (CISA KEV)EPSS 84.1%
  1. Published12 Nov 2024
  2. Added to CISA KEV12 Nov 2024
  3. Remediation due3 Dec 2024
Actively exploited (CISA KEV)

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.

Added to KEV: 12 Nov 2024Federal remediation due: 3 Dec 2024

Description

NTLM Hash Disclosure Spoofing Vulnerability

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeUnchanged
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Affected products

Microsoft Windows 10 1507< 10.0.10240.20826
Microsoft Windows 10 1607< 10.0.14393.7515
Microsoft Windows 10 1809< 10.0.17763.6532
Microsoft Windows 10 21h2< 10.0.19044.5131
Microsoft Windows 10 22h2< 10.0.19045.5131
Microsoft Windows 11 22h2< 10.0.22621.4460
Microsoft Windows 11 23h2< 10.0.22631.4460
Microsoft Windows 11 24h2< 10.0.26100.2314
Microsoft Windows Server 2008r2
Microsoft Windows Server 2012r2
Microsoft Windows Server 2016< 10.0.14393.7515
Microsoft Windows Server 2019< 10.0.17763.6532
Microsoft Windows Server 2022< 10.0.20348.2849
Microsoft Windows Server 2022 23h2< 10.0.25398.1251
Microsoft Windows Server 2025< 10.0.26100.2314

Remediation

Fixed in
Microsoft Windows 10 1507≥ 10.0.10240.20826
Microsoft Windows 10 1607≥ 10.0.14393.7515
Microsoft Windows 10 1809≥ 10.0.17763.6532
Microsoft Windows 10 21h2≥ 10.0.19044.5131
Microsoft Windows 10 22h2≥ 10.0.19045.5131
Microsoft Windows 11 22h2≥ 10.0.22621.4460
Microsoft Windows 11 23h2≥ 10.0.22631.4460
Microsoft Windows 11 24h2≥ 10.0.26100.2314
Microsoft Windows Server 2016≥ 10.0.14393.7515
Microsoft Windows Server 2019≥ 10.0.17763.6532

References

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Frequently asked

Is CVE-2024-43451 being actively exploited?

Yes. CVE-2024-43451 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 12 Nov 2024.

How severe is CVE-2024-43451?

CVE-2024-43451 has a CVSS 3.1 base score of 6.5, rated medium. EPSS estimates a 84.1% probability of exploitation.

Which products are affected by CVE-2024-43451?

Affected products include Microsoft Windows 10 1507, Microsoft Windows 10 1607, Microsoft Windows 10 1809, Microsoft Windows 10 21h2, Microsoft Windows 10 22h2, and 10 more.

How do I fix CVE-2024-43451?

Upgrade affected software to a fixed version, for example Microsoft Windows 10 1507 10.0.10240.20826, Microsoft Windows 10 1607 10.0.14393.7515, Microsoft Windows 10 1809 10.0.17763.6532 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2024-43451 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.