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Unrated severityNVD Advisory· Published Jun 12, 2019· Updated May 20, 2025

Windows NTLM Tampering Vulnerability

CVE-2019-1040

Description

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. An attacker who successfully exploited this vulnerability could gain the ability to downgrade NTLM security features. To exploit this vulnerability, the attacker would need to tamper with the NTLM exchange. The attacker could then modify flags of the NTLM packet without invalidating the signature. The update addresses the vulnerability by hardening NTLM MIC protection on the server-side.

Affected products

29
  • Microsoft/Windows 10 1507cpe-rescue
    Range: 10.0.10240.0
  • Microsoft/Windows 10 1607cpe-rescue
    Range: 10.0.14393.0
  • Microsoft/Windows 10 1703cpe-rescue
    Range: 10.0.0
  • Microsoft/Windows Server version 1709cpe-rescue
    Range: 10.0.0
  • Microsoft/Windows 10 Version 1709 for 32-bit Systemsv5
    Range: 10.0.0
  • Microsoft/Windows 10 Version 1803v5
    Range: 10.0.0
  • Microsoft/Windows 10 1809cpe-rescue
    Range: 10.0.0
  • Microsoft/Windows 10 Version 1903 for 32-bit Systemsv5
    Range: 10.0.0
  • Microsoft/Windows 10 Version 1903 for ARM64-based Systemsv5
    Range: 10.0.0
  • Microsoft/Windows 10 Version 1903 for x64-based Systemsv5
    Range: 10.0.0
  • Microsoft/Windows 7cpe-rescue
    Range: 6.1.0
  • Microsoft/Windows CSC Servicecpe-rescue
    Range: 6.1.0
  • Microsoft/Windows 8.1cpe-rescue
    Range: 6.3.0
  • Microsoft/Windows Server 2008cpe-rescue3 versions
    6.1.7601.0+ 2 more
    • (no CPE)range: 6.1.7601.0
    • (no CPE)range: 6.0.0
    • (no CPE)range: 6.0.6003.0
  • Microsoft/Windows Server 2008 R2 Service Pack 1 (Server Core installation)v5
    Range: 6.1.7601.0
  • Microsoft/Windows Server 2008 R2 Systems Service Pack 1v5
    Range: 6.1.0
  • Microsoft/Windows Server 2008 Service Pack 2 (Server Core installation)v5
    Range: 6.0.6003.0
  • Microsoft/Windows Server 2012cpe-rescue2 versions
    6.2.9200.0+ 1 more
    • (no CPE)range: 6.2.9200.0
    • (no CPE)range: 6.3.9600.0
  • Microsoft/Windows Server 2012 R2 (Server Core installation)v5
    Range: 6.3.9600.0
  • Microsoft/Windows Server 2012 (Server Core installation)v5
    Range: 6.2.9200.0
  • Microsoft/Windows Server 2016cpe-rescue
    Range: 10.0.14393.0
  • Microsoft/Windows Server 2016 (Server Core installation)v5
    Range: 10.0.14393.0
  • Microsoft/Windows Server 2019cpe-rescue
    Range: 10.0.17763.0
  • Microsoft/Windows Server 2019 (Server Core installation)v5
    Range: 10.0.17763.0
  • Microsoft/Windows Server, version 1803 (Server Core Installation)v5
    Range: 10.0.0
  • Microsoft/Windows Server, version 1903 (Server Core installation)v5
    Range: 10.0.0

Patches

0

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

1

News mentions

0

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