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CVE-2024-43451: Microsoft Windows NTLMv2 Hash Disclosure Spoofing Vulnerability

criticalknown exploitedpublic exploitCVE-2024-43451
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as 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.

CSIRTS triage

vendor: Microsoftproduct: WindowsInformation disclosure
What
Microsoft Windows contains an NTLMv2 hash spoofing vulnerability that could disclose a user's NTLMv2 hash to an attacker.
Who is affected
Users of affected versions of Microsoft Windows.
Urgency
Remediation is urgent due to active exploitation and the critical nature of the vulnerability.
Action
Install the latest security updates from Microsoft.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2024-11-12
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2024-43451

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2024-43451coverage & exploitation statusNVD · CVE.org

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