Microsoft has addressed multiple zero-day vulnerabilities in Windows and Office that hackers are actively exploiting. These flaws allow attackers to execute malware with minimal user interaction, primarily through malicious links and files. Security experts warn of a high risk of system compromise and ransomware deployment.

Amazon's threat intelligence teams discovered an advanced threat actor using zero-day vulnerabilities in Cisco and Citrix systems. The actor deployed custom malware to gain unauthorized access, highlighting the risks to critical identity and network access control infrastructures.