A faulty software update from cybersecurity firm CrowdStrike caused an estimated 8.5 million Windows computers worldwide to crash simultaneously — the largest IT outage in history. In the US, the outage grounded thousands of flights at every major airline, disrupted 911 call centers across multiple states, crashed hospital systems forcing rescheduling of surgeries, froze banking and financial services, and halted freight and logistics operations. The incident demonstrated that a single software vendor's update could simultaneously disable critical systems across healthcare, transportation, finance, and emergency services. No malicious actor was involved — the scale of disruption was caused by a routine update process failure.
A faulty software update from cybersecurity firm CrowdStrike caused an estimated 8.5 million Windows computers worldwide to crash simultaneously — the largest IT outage in history. In the US, the outage grounded thousands of flights at every major airline, disrupted 911 call centers across multiple states, crashed hospital systems forcing rescheduling of surgeries, froze banking and financial services, and halted freight and logistics operations. The incident demonstrated that a single software vendor’s update could simultaneously disable critical systems across healthcare, transportation, finance, and emergency services. No malicious actor was involved — the scale of disruption was caused by a routine update process failure.
// Source
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// Incident Details
| Incident Date | 20240719 |
| County | Multiple Counties |
| State | Alabama |
| Severity | High |
| Published | July 19, 2024 |
| Source | CrowdStrike / CISA / FAA |