CVE-2019-1166

moderate-risk
Published 2019-10-10

A tampering vulnerability exists in Microsoft Windows when a man-in-the-middle attacker is able to successfully bypass the NTLM MIC (Message Integrity Check) protection, aka 'Windows NTLM Tampering Vulnerability'.

Do I need to act?

!
13.0% chance of exploitation in next 30 days
EPSS score — higher than 87% of all CVEs
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.9/10 Medium
NETWORK / HIGH complexity

Affected Products (19)

Affected Vendors

Microsoft

References (2)

Patch https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1166
Patch https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1166
49
/ 100
moderate-risk
Severity 18/34 · Moderate
Exploitability 12/34 · Low
Exposure 19/34 · Moderate