A critical vulnerability was found in Nortek Linear eMerge E3 access control systems, allowing unauthenticated remote attackers to execute commands and gain root access. The eMerge E3 system is a popular access control system used by businesses, government agencies, and other organizations to manage physical access to buildings, facilities, and other secure areas. This vulnerability allows attackers to bypass security measures and gain control over the access control system, potentially disrupting operations and compromising sensitive information.