Microsoft has confirmed a broad authentication regression that began appearing after late‑summer cumulative updates for Windows 11 and Windows Server: systems installed with preview update KB5064081 (released August 29, 2025) or the September cumulative KB5065426 can experience repeated...
Microsoft’s recent support bulletin and subsequent community reports have exposed a sharp operational edge of identity hardening: after installing October/September updates on Windows 11 (24H2 and 25H2) and Windows Server 2025, some environments experienced widespread Kerberos and NTLM...