CrowdStrike Falcon Outage
A faulty CrowdStrike Falcon Sensor update crashed ~8.5 million Windows devices on July 19, 2024 — airlines, hospitals, banks, retailers, government services. Recovery required physical access to each device to apply the manual fix.
Impact: Parametrix estimated ~$5.4B in losses across the top 500 US companies. Delta reported $500M in disruption costs and sued CrowdStrike in October 2024; CrowdStrike countersued. Worldwide damage in the tens of billions.
Lesson: Security tools became a single point of failure. Vendor concentration risk in endpoint protection wasn't on most BCPs. Manual recovery procedures and offline operating capability suddenly mattered.