September 2025 Patch Tuesday: The Security Update That’s Actually Worth Your Attention (And Why Waiting Could Cost You Everything)
Microsoft’s September 2025 Patch Tuesday represents one of the most significant security updates of the year, addressing 81 vulnerabilities including 9 critical-severity flaws currently under active exploitation. Security researchers have documented coordinated attack campaigns targeting SharePoint environments and network authentication systems, creating immediate operational risks for UK businesses. While Cyber Essentials compliance allows 14 days for deployment, current threat intelligence suggests strategic deployment within the first week significantly reduces business risk exposure. These patches address fundamental authentication and network security flaws that could compromise customer data protection, regulatory compliance, and business continuity across all organisational infrastructure.