Microsoft Investigates SharePoint Breach and Ransomware Threats

Microsoft is investigating whether a leak from its early alert system for cybersecurity partners, specifically the Microsoft Active Protections Program (MAPP), allowed Chinese hackers to exploit vulnerabilities in SharePoint before they were patched. The breach has affected over 400 entities worldwide, with suspected involvement of Chinese state-sponsored groups. Past incidents suggest potential leaks from the MAPP program, raising concerns about security and transparency, especially given Chinese laws requiring rapid vulnerability reporting and the involvement of Chinese companies in government-linked vulnerability programs.