Microsoft Windows NTLMv2 Hash Disclosure Spoofing Vulnerability (CVE-2024-43451)
Severity: medium · Patch status: patched · Since 2024-11-12 · CVE-2024-43451
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. CISA added CVE-2024-43451 to its Known Exploited Vulnerabilities catalog on Nov 12, 2024, which means attackers are exploiting it in the wild.
What to do
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- US federal agencies must remediate by Dec 3, 2024 (BOD 22-01); treat that as the outer limit.
Sources
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