Protected Extensible Authentication Protocol

So one important example is MS-CHAP version 2.

MSCHAP or CHAP is commonly found inside authentication configurations such as PEAP, MSCHAP version 2, which organizations, from what I understand, use for enterprise Wi-Fi and sometimes VPN access.

With PAP, an outer TLS tunnel protects the authentication exchange, while Microsoft Chat version 2 handles the inner password-based challenge response.

So here's where the problem with the new Windows update comes into play.

just not detected being exploited of note this month as well windows 11 version 24 h2 home and pro and windows 10 enterprise ltsb 2016 have reached their end of support and also a heads up that i believe this is the last update cycle for server 2012 r2 its esu started in october 2023 so you get three years so this should be the last patch cycle for server 2012 r2 and also .NET 8 and .NET 9 go end of life next month.

Also of note for this month, Microsoft Publisher is now being actively removed by Microsoft, and some early issues being flagged includes KB5127648 is reportedly causing Wi-Fi problems for some users, with early indications that this could be linked to NTLM V1 blocking break PEAP in RADIUS.

And there's been suggestions that there's a registry as a workaround, but also uninstalling that KB does fix the issue.

There was also some reports of longer than usual reboots after patching server 2025 machines.