CISA Issues Urgent Alerts for Intune, SharePoint, and Zimbra Flaws Amidst Active Exploitation and Ransomware Attacks

This cybersecurity brief for March 19, 2026, covers a series of critical alerts from CISA regarding actively exploited vulnerabilities in Microsoft Intune, SharePoint, and Zimbra. The advisories follow a disruptive wiper attack on Stryker and confirmation of in-the-wild exploitation. Concurrently, new details emerged about the Interlock ransomware group leveraging a Cisco firewall zero-day for over a month before a patch was available. Other major incidents include multiple data breaches affecting hundreds of thousands of individuals and reports on sophisticated iOS exploit chains, highlighting a landscape of escalating threats from supply chain attacks, ransomware, and state-sponsored actors.