September Patch Tuesday: 963 CVEs, 2 exploited flaws, 1 message

Microsoft’s September 2026 Patch Tuesday is the year’s largest release, with 963 CVEs requiring customer action, 106 rated critical. Two are already exploited: CVE-2026-81963 in the Windows Update Stack and CVE-2026-85880 in Advanced Local Procedure Call . Nothing in this release was publicly disclosed ahead of the patch.