Vulnerability in Microsoft Windows
CVE-2019-1166
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'.
EPSS: 0.617 (99.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N.
Affected products
- Microsoft Windows — versions 7 for 32-bit Systems Service Pack 1, 7 for x64-based Systems Service Pack 1, 8.1 for 32-bit systems
- Microsoft Windows_10 — versions 1607, 1703, 1709
- Microsoft Windows 10 Version 1903 For 32-bit Systems — versions unspecified
- Microsoft Windows 10 Version 1903 For Arm64-based Systems — versions unspecified
- Microsoft Windows 10 Version 1903 For X64-based Systems — versions unspecified
- Microsoft Windows_7
- Microsoft Windows_8.1
- Microsoft Windows_rt_8.1
- Microsoft Windows Server — versions 2008 R2 for x64-based Systems Service Pack 1 (Core installation), 2008 R2 for Itanium-Based Systems Service Pack 1, 2008 R2 for x64-based Systems Service Pack 1
- Microsoft Windows_server_2008 — versions r2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secure@microsoft.com (Patch, x_refsource_MISC, Vendor Advisory)
Frequently asked questions
- What is CVE-2019-1166?
- CVE-2019-1166 is a medium-severity vulnerability in Microsoft Windows, classified under Improper Validation of Integrity Check Value. CVSS score: 5.9/10. Published 2019-10-10.
- How severe is CVE-2019-1166?
- Medium severity. CVSS v3 base score is 5.9 out of 10.
- Is CVE-2019-1166 known to be exploited?
- 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.