CrackMapExec (CME) is an open-source, versatile post-exploitation tool designed for automating security assessments of Windows and Active Directory (AD) environments. Pre-installed on Kali Linux, CME leverages built-in AD protocols to perform stealthy reconnaissance, credential testing, and privilege escalation. By integrating with libraries like Impacket and PowerSploit, it supports tasks such as enumerating users, spidering SMB shares, and executing Mimikatz for credential dumping. Now succeeded by NetExec, CME remains a critical tool for ethical hackers and red teamers.