Microsoft’s Biggest-Ever Patch Tuesday — 206 CVEs, 9 June 2026: The 10-Step IT Admin Action Plan Every UK SME Must Run Before Exploit Wednesday Hits
On 9 June 2026 Microsoft released its largest-ever Patch Tuesday, addressing 206 vulnerabilities — including 37 critical flaws, 3 publicly disclosed zero-days and two CVSS 9.8 remote code execution vulnerabilities in the Windows Kernel and HTTP.sys — making it the biggest single security release in the programme’s 23-year history. With Cyber Essentials v3.3 now mandating a strict 14-day patch window for critical fixes, every UK SME still running unpatched Windows systems as of 1 July 2026 is already outside compliance and structurally exposed.
























