CVE-2019-1338: Microsoft Windows 7

Medium severity, CVSS 5.9. EPSS: 3.6% chance of exploitation in the next 30 days.

A security feature bypass vulnerability exists in Microsoft Windows when a man-in-the-middle attacker is able to successfully bypass the NTLMv2 protection if a client is also sending LMv2 responses, aka 'Windows NTLM Security Feature Bypass Vulnerability'.

Affected products

• Microsoft Windows 7: affected versions not specified
• Microsoft Windows Server 2008: affected versions not specified; version r2 only

Published 2019-10-10. Last modified 2026-06-17.