Networking problems after the October 2026 Windows update? NTLM might be to blame
Summary
Microsoft is enforcing a default deprecation of the NTLM protocol in an upcoming Windows update scheduled for October 2026. This change aims to address ongoing security concerns associated with the legacy protocol and highlight the progress of migration to more secure authentication methods.
IFF Assessment
The deprecation of NTLM, a legacy protocol, is a security enhancement, but the article focuses on the potential for networking problems during the transition, which presents a challenge for IT administrators and thus can be viewed as problematic for defenders during the migration phase.
Defender Context
Administrators should proactively plan for the deprecation of NTLM and ensure their environments are updated to use more secure authentication protocols like Kerberos. Failure to migrate could lead to networking issues or security vulnerabilities if legacy systems remain reliant on NTLM.