Microsoft has patched a zero-day vulnerability in the Windows Remote Access Connection Manager (RasMan) service, tracked as CVE-2026-21525, which allowed attackers to trigger denial-of-service (DoS) conditions on unpatched systems. The flaw, stemming from a NULL pointer dereference (CWE-476), was actively exploited in the wild before disclosure, earning an “Exploitation Detected” rating from Microsoft’s MSRC exploitability […] The post Windows Remote Access Connection Manager 0-Day Vulnerability Let Attackers Trigger DoS Attack appeared first on Cyber Security News.