Microsoft Windows NTLMv2 Hash Disclosure Spoofing Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2024-11-12
• EPSS: 84% chance of exploitation in the next 30 days (higher than 100% of CVEs)

[ Description ]Official description

NTLM Hash Disclosure Spoofing Vulnerability

CISA: 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.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 3 Dec 2024): Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

• Patch on msrc.microsoft.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD

[ References ]References

• msrc.microsoft.com/update-guide/vulnerability/CVE-2024-43451PatchVendor Advisory
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource