Vulnerability Database

300,830

Total vulnerabilities in the database

CVE-2019-1338

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'.

  • Published: Oct 10, 2019
  • Updated: Nov 9, 2025
  • CVE: CVE-2019-1338
  • Severity: Medium
  • Exploit:

CVSS v3:

  • Severity: Medium
  • Score: 5.9
  • AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS v2:

  • Severity: Low
  • Score: 4.3
  • AV:N/AC:M/Au:N/C:N/I:P/A:N

No CWE or OWASP classifications available.

Software From Fixed in
microsoft / windows_server_2008 r2-sp1 r2-sp1.x
microsoft / windows_server_2008 --sp2 --sp2.x
microsoft / windows_7 --sp1 --sp1.x