The issue is related to errors in handling hard links in the Windows AppX Deployment Service (AppXSVC), which can be exploited by an attacker to elevate their privileges using a specially crafted application. An elevation-of-privilege vulnerability allows attackers to affect the system. There have been reports of a bypass for the recent Windows patch, with a second zero-day exploit disclosed that apparently bypasses Microsoft's patch for a Windows Elevation of Privilege (EoP) vulnerability.