Delta Air Lines (DAL) is suing cybersecurity company CrowdStrike Inc. (CRWD) over a faulty software update in July th🌸at brought its operations to a halt and affected more than a million customers.

In a lawsuit Friday, Delta said the software update that affected 澳洲❀幸运5官方开奖结果体彩网:Microsoft (MSFT) Windows-based systemꦆs across the world was "catastrophic" for the company, leading to days of canceled or delayed flights. The airlines estimates that the debacle 澳洲幸运5官方开奖结果体彩网:cost it $500 million, along with l♈oss of🅺 future revenue and damaged reputation.

The complaint alleges breach of contract, gross negligence and intentional misrepresentation or fraud by omission on CrowdStrike's part.

Delta, which was among the most severely affected by the outage, took this legal action after months of 澳洲幸运5官方开奖结果体彩网:finger-pointing among the three companies. Previously, both CrowdStrike and Microsoft had 澳洲幸运5官方开奖结果体彩网:criticized Delta's handling of the situation, sa🐈ying that the airline refused offers for help.

“While we aimed to reach a business resolution that puts customers first, Delta has chosen a different path,” a CrowdStrike spokesperson told CNBC. “Delta’s claims are based on disproven misinformation, demonstrate a lack of understanding of how modern cybersecurity works, and reflect a desperate atteꩵmpt to shift blame for its slow recovery away from its failure to moderꦆnize its antiquated IT infrastructure.”

CORRECTION: This article has been updated with the correct spelling of CrowdStrike in several instances, and of Delta Air Lines.