Microsoft has identified a new malware, Lumma, which has been found on approximately 394,000 Windows PCs. The Lumma password stealer is designed to capture sensitive login information, raising significant security concerns for users. Microsoft is urging users to take precautions to protect their devices from this threat.

Microsoft's August 2025 Patch Tuesday addressed 107 vulnerabilities, including a critical zero-day in Windows Kerberos that could allow domain administrator privilege escalation. The update also fixed thirteen critical vulnerabilities, predominantly related to remote code execution and information disclosure, highlighting ongoing security challenges for Windows users.