Cybersecurity firm CrowdStrike said a “significant number” of devices affected by a global IT outage on Friday are now back online.
The company added in a social media post that it “continues to focus on restoring all systems” after a faulty security update crashed Microsoft Windows PCs around the world.
The incident has been described as one of the worst IT disruptions in history, according to Microsoft estimates. Impacted 8.5 million computers worldwide.
Businesses, banks, hospitals and airlines were among the hardest hit, with some still struggling to fully restore their systems.
“We understand the profound impact this has on everyone. We know our customers, partners and their IT teams are working tirelessly, and we are deeply grateful.” CrowdStrike says.
“We apologize for the disruption this has caused.”
The company also said it was deploying new fixes in the hope of speeding up the recovery of computer systems.
However, CrowdStrike did not disclose how many devices are still affected.
More than 1,400 flights in and out of the United States were canceled on Sunday, according to aviation tracking and data platform FlightAware.
Delta Air Lines and United Airlines are the most affected U.S. airlines.
Health services in the UK, Israel and Germany were also affected on Friday, with some services canceled.
The massive outage put a spotlight on the fragility of global computer networks, showing how a single failure could cause global chaos.
“Today, a single glitch often causes entire system outages, affecting industries ranging from health care and airlines to banks and car dealers,” FTC Chairwoman Lina Khan said in a social media post.
“These events reveal how concentration creates fragile systems.”
Until this incident, the company had been one of the most trusted names in the cybersecurity industry.
According to the CrowdStrike website, the company has 29,000 customers worldwide, including some of the largest companies in the United States.
China is one of the major economies largely unaffected by the blackoutas CrowdStrike is not widely available in the country.
China is also not as dependent on Microsoft as the rest of the world.
