Microsoft discloses a material cybersecurity incident

What the filing says

On January 12, 2024, Microsoft (the "Company" or "we") detected that beginning in late November 2023, a nation-state associated threat actor had gained access to and exfiltrated information from a very small percentage of employee email accounts including members of our senior leadership team and employees in our cybersecurity, legal, and other functions, on the basis of preliminary analysis. We were able to remove the threat actor's access to the email accounts on or about January 13, 2024. We are examining the information accessed to determine the impact of the incident.

1. Amended filing · Mar 8, 00:00 UTC
   8-K/A: As disclosed in the Original Filing, the Company detected that beginning in late November 2023, a nation-state threat actor had gained access to and exfiltrated information from a very small percentage of employee email accounts including members of our senior leadership team and employees in our cybersecurity, legal, and other functions. Since the date of the Original Filing, the Company has determined that the threat actor used and continues to use information it obtained to gain, or attempt to gain, unauthorized access to some of the Company's source code repositories and internal systems. The threat actor's ongoing attack is characterized by a sustained, significant commitment of the thr