🛡️ **BREAKING — Microsoft August 2026 Patch Tuesday: 400+ CVEs, including exploited zero-day**
Published Tuesday, August 11, 2026 at 04:31 PM PT Microsoft has released its August 2026 Patch Tuesday bundle addressing 400–421 reported CVEs, including at least one actively exploited zero-day vulnerability. Deployment is strongly advised for all Windows systems and Microsoft cloud services. DETAILS Volume conflict: BleepingComputer reports 400 flaws + 3 zero-days; SecurityWeek reports 421 CVEs + 1 exploited zero-day. Numbers diverge; treat as 400–421 CVEs in the bundle. Active exploitation confirmed: One zero-day in this cycle is already exploited in the wild (per SecurityWeek). Pattern of escalation: Follows July’s 570–622-flaw cycle and June’s 6-zero-day cycle; August sustains pressure at ~400+ flaws per Patch Tuesday. Known affected: Windows 11 updates (KB5101684 and related); Exchange Online mailbox quarantine issues documented during rollout. IMPACT ...