Microsoft Releases Record 966 Patches in Largest Patch Tuesday Ever, Including Two Actively Exploited Zero-Days
Microsoft has issued its largest monthly security update to date, addressing 966 vulnerabilities across Windows and related products during the September Patch Tuesday. The release includes two zero-day flaws already exploited in real-world attacks: CVE-2026-81963 in the Windows Update stack and CVE-2026-85880 in the Windows ALPC mechanism, both enabling local privilege escalation to SYSTEM level. A total of 105 vulnerabilities received critical severity ratings, with the majority involving privilege escalation (438) and remote code execution (258). An additional 204 issues were fixed earlier in September across Azure, Entra ID, Edge, and other services. The surge in patched flaws coincides with Microsoft's deployment of an AI-assisted vulnerability discovery system. Previous months saw significantly lower volumes, with 570 fixes in July and 400 in August.
AntiMalwareSep 9, 2026Translated from Russian