Microsoft: Sept Windows Server updates cause Active Directory issues

Microsoft has confirmed that the September 2025 security updates are causing Active Directory issues on Windows Server 2025 systems.
Windows Report

Microsoft Confirms Directory Sync Failure on Windows Server 2025 for Large AD Security Groups

Microsoft has confirmed that a new bug in Windows Server 2025 causes directory sync failures for AD groups with over 10,000 members.

Microsoft issues fix as Windows 11 25H2, 24H2 KB5066835, KB5065789 break many IIS websites

Microsoft has confirmed that IIS connections have broken following recent KB5066835, KB5065789 updates on Windows 11 25H2 and ...
CSO Online

October 2025 Patch Tuesday: Holes in Windows Server Update Service and an ancient modem driver

Admins are urged to immediately patch actively exploited vulnerabilities, including those in the legacy Agere modem driver in ...

Windows 11 updates break localhost (127.0.0.1) HTTP/2 connections

Microsoft' Windows 11 updates have broken the "localhost" functionality, making applications that connect back to 127.0.0.1 ...

Why Windows 11 requires a TPM - and how you can get around it

Windows 11 officially requires a Trusted Platform Module. Here's why and what to do if your old PC doesn't have one.
SecurityWeek

Microsoft Revokes Over 200 Certificates to Disrupt Ransomware Campaign

Microsoft announced that it has disrupted a Vanilla Tempest campaign whose goal was the deployment of Rhysida ransomware.

Windows 11 wrecks localhost functionality with latest cumulative update

The recent KB5066835 update for Windows 11 broke the operating system's localhost interface, prompting affected users and developers to uninstall the patch in an attempt to ...