Kerberos Security
The latest Kerberos Security coverage — news, analysis, and updates from the WindowsNews.AI desk.
Windows 11’s July Update Pulls the Plug on RC4 Kerberos — Are You Ready?
Microsoft shipped the July 2026 cumulative update for Windows 11 on Tuesday, delivering a fix for a widely reported Office automation bug while simultaneously removing the safety net from...
Prepare Now: Microsoft Permanently Removes Kerberos RC4 Rollback on July 14
Microsoft’s July 14, 2026 cumulative updates will strip out the long‑standing Kerberos RC4 rollback control from all supported Windows Server domain controllers. At the same time, administrators...
Windows 11 26H2 Hits Insider Testing as Microsoft Lays Out Kerberos RC4 Retirement Roadmap
Microsoft has quietly pushed Windows 11 version 26H2 into early Insider testing, the company confirmed in its June 2026 Windows IT Pro recap. The milestone signals that the next major feature update...
Windows Kerberos RC4 Deprecation Deadline: Complete AES Migration Guide for Active Directory
Microsoft has quietly but deliberately set a firm deadline to end a decades-long compatibility compromise: RC4 (RC4-HMAC) will no longer be the assumed, permissive fallback for Kerberos ticket...
CVE-2026-20849: Critical Kerberos Privilege Escalation Threatens Windows Active Directory Security
Microsoft has issued an urgent security advisory for a critical elevation-of-privilege vulnerability in the Windows Kerberos authentication protocol, tracked as CVE-2026-20849, that poses significant...
CVE-2026-20849: Analyzing the Kerberos Privilege Escalation Threat & Windows Security Response
A newly disclosed vulnerability tracked as CVE-2026-20849 has emerged as a significant security concern for Windows administrators and security professionals. Microsoft's security portal classifies...