It's urging customers to "apply these updates immediately to ensure they are protected." "With the rapid adoption of these exploits, Microsoft assesses with high confidence that threat actors will continue to integrate them into their attacks against unpatched on-premises SharePoint systems," the company warned in the post on its security blog. The incident is the latest test of Microsoft's cybersecurity overhaul, known as the Secure Future Initiative. Launched amid a series of damaging nation-state attacks — and escalated after a critical Cyber Safety Review Board report — the program aims to improve the security of Microsoft's engineering and reduce the risk of breaches. CEO Satya Nadella has declared security the company's top priority, and Microsoft has tied a portion of executive compensation to measurable progress. But the continued emergence of high-impact vulnerabilities — especially in legacy on-premises systems — underscores the scale of the challenge and the urgency of the reforms.