Top 5 Cybersecurity News Stories August 21, 2026

Cybersecurity News Stories August 21, 2026: VMware vCenter CVSS 9.8, SharePoint JWT bypass, macOS root exploit, MLflow SSRF, Cisco ASA DoS — five layers.

This week’s Cybersecurity News Stories August 21, 2026 arrives at a moment when the breadth of simultaneous active exploitation across enterprise infrastructure demands attention that goes beyond any single advisory. Within a seven-day window, CISA added five separate vulnerabilities to its Known Exploited Vulnerabilities catalogue across five entirely different product categories: VMware vCenter, Microsoft SharePoint,…

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