Failover Cluster
The latest Failover Cluster coverage — news, analysis, and updates from the WindowsNews.AI desk.
CVE-2026-21251: Critical Windows Failover Cluster Vulnerability Explained
Microsoft has disclosed a significant security vulnerability affecting Windows Server Failover Clusters, designated CVE-2026-21251, which presents a critical elevation-of-privilege risk in enterprise...
AWS EC2 architects cut Windows Server 2022 costs via instance right-sizing and licensing optimization.
Windows Server 2022 on AWS EC2 represents a powerful convergence of Microsoft's enterprise server platform with Amazon's elastic cloud infrastructure, offering organizations familiar Windows...
Microsoft Quietly Adds S2D and SAN CSV Coexistence to Windows Server 2022 Failover Clusters
Microsoft has quietly closed a long-standing operational gap for datacenter teams: Windows Server failover clusters can now host Storage Spaces Direct (S2D)-backed Cluster Shared Volumes (CSVs) and...
SQL Server FCI on AWS EC2: 3-AZ High Availability with Storage Spaces Direct
The landscape of enterprise database deployment is undergoing a significant transformation as organizations increasingly migrate mission-critical SQL Server workloads to cloud environments....
CVE-2025-59260: Critical Failover Cluster Vulnerability Exposes Sensitive Data
Microsoft has confirmed CVE-2025-59260 as a critical local information disclosure vulnerability affecting the Microsoft Failover Cluster virtual driver, with the potential to expose sensitive cluster...
CVE-2025-59188: Microsoft Failover Cluster Information Disclosure Vulnerability Analysis
Microsoft has issued a critical security advisory for CVE-2025-59188, a significant information disclosure vulnerability affecting Microsoft Failover Cluster that could allow low-privileged local...
CVE-2025-47979: Critical Windows Failover Cluster Information Disclosure Vulnerability
Microsoft has disclosed a significant security vulnerability in Windows Failover Clustering that could expose sensitive cluster configuration data through accessible log files. CVE-2025-47979, rated...
Azure Arc-Enabled SQL Server Hits US Gov Virginia—FCI and AG Support Still Missing
Microsoft has officially brought Azure Arc-enabled SQL Server to the US Government Virginia region, opening the door for federal agencies and government contractors to manage on‑premises and hybrid...
Microsoft Ships KB5063877 to Patch Critical Windows Server 2019 Cluster Flaw After Weeks of Downtime
Microsoft released its August cumulative update, KB5063877, on August 12, 2025, plugging a catastrophic clustering regression that had paralyzed Windows Server 2019 failover clusters for more than a...
Windows Server 2019 KB5062557 Patch Causes Widespread Virtualization Failures: Impact and Recovery Strategies
The arrival of the July 2025 security update for Windows Server 2019, published under the identifier KB5062557, has sent a shockwave through the IT community. Billed as a critical patch targeting...
Building Resilient SQL Server Stretch Clusters on AWS: High Availability Across Availability Zones
In today's data-driven landscape, where minutes of database downtime can translate to millions in lost revenue, enterprises are increasingly turning to cloud platforms like AWS to build resilient SQL...