Cybersecurity firm CrowdStrike said Friday that an issue that has caused major disruptions to companies worldwide is not a security incident or cyberattack.

CrowdStrike CEO George Kurtz posted on social media platform X that the company “is actively working with customers impacted by a defect found in a single content update for Windows hosts.”

He said: “This is not a security incident or cyberattack. The issue has been identified, isolated and a fix has been deployed.”